20520340674 has 64 divisors (see below), whose sum is σ = 43363192320. Its totient is φ = 6465070080.

The previous prime is 20520340609. The next prime is 20520340741. The reversal of 20520340674 is 47604302502.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2170662 + ... + 2180094.

It is an arithmetic number, because the mean of its divisors is an integer number (677549880).

Almost surely, 2^20520340674 is an apocalyptic number.

20520340674 is an abundant number, since it is smaller than the sum of its proper divisors (22842851646).

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

20520340674 is a wasteful number, since it uses less digits than its factorization.

20520340674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755.

The product of its (nonzero) digits is 40320, while the sum is 33.

The spelling of 20520340674 in words is "twenty billion, five hundred twenty million, three hundred forty thousand, six hundred seventy-four".