20807575311 has 32 divisors (see below), whose sum is σ = 28350743040. Its totient is φ = 13571510400.

The previous prime is 20807575267. The next prime is 20807575331. The reversal of 20807575311 is 11357570802.

It is not a de Polignac number, because 20807575311 - 2⁶ = 20807575247 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20807575311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20807575331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29347425 + ... + 29348133.

It is an arithmetic number, because the mean of its divisors is an integer number (885960720).

Almost surely, 2^20807575311 is an apocalyptic number.

20807575311 is a deficient number, since it is larger than the sum of its proper divisors (7543167729).

20807575311 is a wasteful number, since it uses less digits than its factorization.

20807575311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1647.

The product of its (nonzero) digits is 58800, while the sum is 39.

The spelling of 20807575311 in words is "twenty billion, eight hundred seven million, five hundred seventy-five thousand, three hundred eleven".