10031200020 has 36 divisors (see below), whose sum is σ = 30427973940. Its totient is φ = 2674986624.

The previous prime is 10031199991. The next prime is 10031200051. The reversal of 10031200020 is 2000213001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6228997776 + 3802202244 = 78924^2 + 61662^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 10031199975 and 10031200011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27864265 + ... + 27864624.

Almost surely, 2^10031200020 is an apocalyptic number.

10031200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10031200020 is an abundant number, since it is smaller than the sum of its proper divisors (20396773920).

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

10031200020 is a wasteful number, since it uses less digits than its factorization.

10031200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55728904 (or 55728899 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 10031200020 its reverse (2000213001), we get a palindrome (12031413021).

The spelling of 10031200020 in words is "ten billion, thirty-one million, two hundred thousand, twenty".