20011655104 has 56 divisors (see below), whose sum is σ = 46439051648. Its totient is φ = 8376963840.

The previous prime is 20011655089. The next prime is 20011655107. The reversal of 20011655104 is 40155611002.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011655107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 500142 + ... + 538669.

Almost surely, 2^20011655104 is an apocalyptic number.

It is an amenable number.

20011655104 is an abundant number, since it is smaller than the sum of its proper divisors (26427396544).

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

20011655104 is a wasteful number, since it uses less digits than its factorization.

20011655104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038873 (or 1038863 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The spelling of 20011655104 in words is "twenty billion, eleven million, six hundred fifty-five thousand, one hundred four".