1820001950 has 24 divisors (see below), whose sum is σ = 3645605208. Its totient is φ = 672000480.

The previous prime is 1820001941. The next prime is 1820001959. The reversal of 1820001950 is 591000281.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1820001941) and next prime (1820001959).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820001959) 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 11 ways as a sum of consecutive naturals, for example, 1399352 + ... + 1400651.

It is an arithmetic number, because the mean of its divisors is an integer number (151900217).

Almost surely, 2^1820001950 is an apocalyptic number.

1820001950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1820001950 is an abundant number, since it is smaller than the sum of its proper divisors (1825603258).

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

1820001950 is a wasteful number, since it uses less digits than its factorization.

1820001950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800028 (or 2800023 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1820001950 is about 42661.4808697495. The cubic root of 1820001950 is about 1220.9295857928.

The spelling of 1820001950 in words is "one billion, eight hundred twenty million, one thousand, nine hundred fifty".