20511713900 has 36 divisors (see below), whose sum is σ = 44556658608. Its totient is φ = 8196162240.

The previous prime is 20511713897. The next prime is 20511713923. The reversal of 20511713900 is 931711502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9359 + ... + 202758.

Almost surely, 2^20511713900 is an apocalyptic number.

20511713900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20511713900 is an abundant number, since it is smaller than the sum of its proper divisors (24044944708).

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

20511713900 is a wasteful number, since it uses less digits than its factorization.

20511713900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213098 (or 213091 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 29.

The spelling of 20511713900 in words is "twenty billion, five hundred eleven million, seven hundred thirteen thousand, nine hundred".