20604560394 has 32 divisors (see below), whose sum is σ = 45911909376. Its totient is φ = 6110958320.

The previous prime is 20604560377. The next prime is 20604560399. The reversal of 20604560394 is 49306540602.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20604560399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3318072 + ... + 3324275.

It is an arithmetic number, because the mean of its divisors is an integer number (1434747168).

Almost surely, 2^20604560394 is an apocalyptic number.

20604560394 is an abundant number, since it is smaller than the sum of its proper divisors (25307348982).

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

20604560394 is a wasteful number, since it uses less digits than its factorization.

20604560394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642410.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 20604560394 in words is "twenty billion, six hundred four million, five hundred sixty thousand, three hundred ninety-four".