20021572274 has 16 divisors (see below), whose sum is σ = 32810990976. Its totient is φ = 9087265200.

The previous prime is 20021572229. The next prime is 20021572309. The reversal of 20021572274 is 47227512002.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021572274.

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, 657242 + ... + 687029.

It is an arithmetic number, because the mean of its divisors is an integer number (2050686936).

Almost surely, 2^20021572274 is an apocalyptic number.

20021572274 is a deficient number, since it is larger than the sum of its proper divisors (12789418702).

20021572274 is a wasteful number, since it uses less digits than its factorization.

20021572274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344961.

The product of its (nonzero) digits is 15680, while the sum is 32.

It can be divided in two parts, 20021 and 572274, that added together give a palindrome (592295).

The spelling of 20021572274 in words is "twenty billion, twenty-one million, five hundred seventy-two thousand, two hundred seventy-four".