20555765574 has 16 divisors (see below), whose sum is σ = 42898989312. Its totient is φ = 6554012168.

The previous prime is 20555765561. The next prime is 20555765579. The reversal of 20555765574 is 47556755502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20555765579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74477274 + ... + 74477549.

It is an arithmetic number, because the mean of its divisors is an integer number (2681186832).

Almost surely, 2^20555765574 is an apocalyptic number.

20555765574 is an abundant number, since it is smaller than the sum of its proper divisors (22343223738).

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

20555765574 is a wasteful number, since it uses less digits than its factorization.

20555765574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148954851.

The product of its (nonzero) digits is 7350000, while the sum is 51.

The spelling of 20555765574 in words is "twenty billion, five hundred fifty-five million, seven hundred sixty-five thousand, five hundred seventy-four".