20516542311 has 16 divisors (see below), whose sum is σ = 28029028608. Its totient is φ = 13341028800.

The previous prime is 20516542297. The next prime is 20516542351. The reversal of 20516542311 is 11324561502.

It is not a de Polignac number, because 20516542311 - 2²⁷ = 20382324583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20516542351) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 599710 + ... + 632996.

It is an arithmetic number, because the mean of its divisors is an integer number (1751814288).

Almost surely, 2^20516542311 is an apocalyptic number.

20516542311 is a deficient number, since it is larger than the sum of its proper divisors (7512486297).

20516542311 is a wasteful number, since it uses less digits than its factorization.

20516542311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38342.

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 20516542311 in words is "twenty billion, five hundred sixteen million, five hundred forty-two thousand, three hundred eleven".