20818522 has 8 divisors (see below), whose sum is σ = 31248000. Its totient is φ = 10402524.

The previous prime is 20818517. The next prime is 20818537. The reversal of 20818522 is 22581802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2629 + ... + 6967.

It is an arithmetic number, because the mean of its divisors is an integer number (3906000).

Almost surely, 2^20818522 is an apocalyptic number.

20818522 is a deficient number, since it is larger than the sum of its proper divisors (10429478).

20818522 is a wasteful number, since it uses less digits than its factorization.

20818522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6740.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20818522 is about 4562.7318571224. The cubic root of 20818522 is about 275.0953806886.

The spelling of 20818522 in words is "twenty million, eight hundred eighteen thousand, five hundred twenty-two".