20039012100 has 54 divisors (see below), whose sum is σ = 62811172970. Its totient is φ = 5343736320.

The previous prime is 20039012029. The next prime is 20039012101. The reversal of 20039012100 is 121093002.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 362217024 + 19676795076 = 19032^2 + 140274^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20039012101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11131885 + ... + 11133684.

Almost surely, 2^20039012100 is an apocalyptic number.

20039012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20039012100 is an abundant number, since it is smaller than the sum of its proper divisors (42772160870).

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

20039012100 is a wasteful number, since it uses less digits than its factorization.

20039012100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22265589 (or 22265579 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The spelling of 20039012100 in words is "twenty billion, thirty-nine million, twelve thousand, one hundred".