20115511044 has 24 divisors (see below), whose sum is σ = 46938554208. Its totient is φ = 6704832960.

The previous prime is 20115510991. The next prime is 20115511099. The reversal of 20115511044 is 44011551102.

It is a super-2 number, since 2×20115511044² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 358539 + ... + 410829.

It is an arithmetic number, because the mean of its divisors is an integer number (1955773092).

Almost surely, 2^20115511044 is an apocalyptic number.

It is an amenable number.

20115511044 is an abundant number, since it is smaller than the sum of its proper divisors (26823043164).

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

20115511044 is a wasteful number, since it uses less digits than its factorization.

20115511044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84355 (or 84353 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 20115511044 in words is "twenty billion, one hundred fifteen million, five hundred eleven thousand, forty-four".