20564701534 has 16 divisors (see below), whose sum is σ = 34664247072. Its totient is φ = 9078730848.

The previous prime is 20564701529. The next prime is 20564701541. The reversal of 20564701534 is 43510746502.

It is a junction number, because it is equal to n+sod(n) for n = 20564701493 and 20564701502.

It is a congruent number.

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, 17193969 + ... + 17195164.

It is an arithmetic number, because the mean of its divisors is an integer number (2166515442).

Almost surely, 2^20564701534 is an apocalyptic number.

20564701534 is a deficient number, since it is larger than the sum of its proper divisors (14099545538).

20564701534 is a wasteful number, since it uses less digits than its factorization.

20564701534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34389171.

The product of its (nonzero) digits is 100800, while the sum is 37.

The spelling of 20564701534 in words is "twenty billion, five hundred sixty-four million, seven hundred one thousand, five hundred thirty-four".