20297562 has 16 divisors (see below), whose sum is σ = 40772160. Its totient is φ = 6736352.

The previous prime is 20297539. The next prime is 20297587. The reversal of 20297562 is 26579202.

It is a happy number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 5862 + ... + 8657.

It is an arithmetic number, because the mean of its divisors is an integer number (2548260).

Almost surely, 2^20297562 is an apocalyptic number.

20297562 is an abundant number, since it is smaller than the sum of its proper divisors (20474598).

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

20297562 is a wasteful number, since it uses less digits than its factorization.

20297562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14757.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20297562 is about 4505.2815672275. The cubic root of 20297562 is about 272.7813193292.

It can be divided in two parts, 2029 and 7562, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 20297562 in words is "twenty million, two hundred ninety-seven thousand, five hundred sixty-two".