20564750562 has 16 divisors (see below), whose sum is σ = 42132660192. Its totient is φ = 6687723680.

The previous prime is 20564750539. The next prime is 20564750597. The reversal of 20564750562 is 26505746502.

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, 41798028 + ... + 41798519.

It is an arithmetic number, because the mean of its divisors is an integer number (2633291262).

Almost surely, 2^20564750562 is an apocalyptic number.

20564750562 is an abundant number, since it is smaller than the sum of its proper divisors (21567909630).

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

20564750562 is a wasteful number, since it uses less digits than its factorization.

20564750562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83596593.

The product of its (nonzero) digits is 504000, while the sum is 42.

The spelling of 20564750562 in words is "twenty billion, five hundred sixty-four million, seven hundred fifty thousand, five hundred sixty-two".