20192309564 has 24 divisors (see below), whose sum is σ = 40388812128. Its totient is φ = 8652948480.

The previous prime is 20192309551. The next prime is 20192309567. The reversal of 20192309564 is 46590329102.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20192309567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286124 + ... + 349644.

It is an arithmetic number, because the mean of its divisors is an integer number (1682867172).

Almost surely, 2^20192309564 is an apocalyptic number.

It is an amenable number.

20192309564 is an abundant number, since it is smaller than the sum of its proper divisors (20196502564).

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

20192309564 is a wasteful number, since it uses less digits than its factorization.

20192309564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74885 (or 74883 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 20192309564 in words is "twenty billion, one hundred ninety-two million, three hundred nine thousand, five hundred sixty-four".