1000250020 has 96 divisors (see below), whose sum is σ = 2709262080. Its totient is φ = 301002240.

The previous prime is 1000250011. The next prime is 1000250023. The reversal of 1000250020 is 200520001.

1000250020 = T₂₀₀₀₀ + T₂₀₀₀₁ + ... + T₂₀₀₀₄.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1000249979 and 1000250006.

It is not an unprimeable number, because it can be changed into a prime (1000250023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33462 + ... + 55858.

It is an arithmetic number, because the mean of its divisors is an integer number (28221480).

Almost surely, 2^1000250020 is an apocalyptic number.

1000250020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000250020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1354631040).

1000250020 is an abundant number, since it is smaller than the sum of its proper divisors (1709012060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000250020 is a wasteful number, since it uses less digits than its factorization.

1000250020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22453 (or 22451 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 1000250020 is about 31626.7295179252. The cubic root of 1000250020 is about 1000.0833330554.

Adding to 1000250020 its reverse (200520001), we get a palindrome (1200770021).

The spelling of 1000250020 in words is "one billion, two hundred fifty thousand, twenty".