20642522 has 32 divisors (see below), whose sum is σ = 34350480. Its totient is φ = 9262080.

The previous prime is 20642521. The next prime is 20642527. The reversal of 20642522 is 22524602.

It can be written as a sum of positive squares in 8 ways, for example, as 6497401 + 14145121 = 2549^2 + 3761^2 .

It is a super-2 number, since 2×20642522² = 852227429040968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20642521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76604 + ... + 76872.

Almost surely, 2^20642522 is an apocalyptic number.

20642522 is a deficient number, since it is larger than the sum of its proper divisors (13707958).

20642522 is a wasteful number, since it uses less digits than its factorization.

20642522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20642522 is about 4543.4042303101. The cubic root of 20642522 is about 274.3179660684.

The spelling of 20642522 in words is "twenty million, six hundred forty-two thousand, five hundred twenty-two".