20852816 has 20 divisors (see below), whose sum is σ = 40473600. Its totient is φ = 10408032.

The previous prime is 20852809. The next prime is 20852831. The reversal of 20852816 is 61825802.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 15665 + ... + 16943.

It is an arithmetic number, because the mean of its divisors is an integer number (2023680).

Almost surely, 2^20852816 is an apocalyptic number.

It is an amenable number.

20852816 is a deficient number, since it is larger than the sum of its proper divisors (19620784).

20852816 is a wasteful number, since it uses less digits than its factorization.

20852816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2300 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20852816 is about 4566.4883663489. The cubic root of 20852816 is about 275.2463511481.

The spelling of 20852816 in words is "twenty million, eight hundred fifty-two thousand, eight hundred sixteen".