1400020020 has 216 divisors, whose sum is σ = 4968722304. Its totient is φ = 312573312.

The previous prime is 1400019983. The next prime is 1400020021. The reversal of 1400020020 is 200200041.

It is a Harshad number since it is a multiple of its sum of digits (9).

1400020020 is a modest number, since divided by 20020 gives 1400 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1400019984 and 1400020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400020021) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2783089 + ... + 2783591.

It is an arithmetic number, because the mean of its divisors is an integer number (23003344).

Almost surely, 2^1400020020 is an apocalyptic number.

1400020020 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 1400020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2484361152).

1400020020 is an abundant number, since it is smaller than the sum of its proper divisors (3568702284).

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

1400020020 is a wasteful number, since it uses less digits than its factorization.

1400020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 567 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 1400020020 is about 37416.8413952862. The cubic root of 1400020020 is about 1118.6942744733.

Adding to 1400020020 its reverse (200200041), we get a palindrome (1600220061).

The spelling of 1400020020 in words is "one billion, four hundred million, twenty thousand, twenty".