20511409796 has 48 divisors (see below), whose sum is σ = 38531324160. Its totient is φ = 9524136960.

The previous prime is 20511409783. The next prime is 20511409817. The reversal of 20511409796 is 69790411502.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8381045 + ... + 8383491.

It is an arithmetic number, because the mean of its divisors is an integer number (802735920).

Almost surely, 2^20511409796 is an apocalyptic number.

It is an amenable number.

20511409796 is a deficient number, since it is larger than the sum of its proper divisors (18019914364).

20511409796 is a wasteful number, since it uses less digits than its factorization.

20511409796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4604 (or 4602 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 20511409796 in words is "twenty billion, five hundred eleven million, four hundred nine thousand, seven hundred ninety-six".