20715522 has 16 divisors (see below), whose sum is σ = 41696832. Its totient is φ = 6860880.

The previous prime is 20715517. The next prime is 20715547. The reversal of 20715522 is 22551702.

It is a junction number, because it is equal to n+sod(n) for n = 20715492 and 20715501.

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, 10054 + ... + 11937.

It is an arithmetic number, because the mean of its divisors is an integer number (2606052).

Almost surely, 2^20715522 is an apocalyptic number.

20715522 is an abundant number, since it is smaller than the sum of its proper divisors (20981310).

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

20715522 is a wasteful number, since it uses less digits than its factorization.

20715522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22153.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20715522 is about 4551.4307640565. The cubic root of 20715522 is about 274.6409507009.

The spelling of 20715522 in words is "twenty million, seven hundred fifteen thousand, five hundred twenty-two".