20852690 has 16 divisors (see below), whose sum is σ = 39510720. Its totient is φ = 7902000.

The previous prime is 20852687. The next prime is 20852701. The reversal of 20852690 is 9625802.

It is a super-2 number, since 2×20852690² = 869669360472200, which contains 22 as substring.

It is a Curzon 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, 54686 + ... + 55065.

It is an arithmetic number, because the mean of its divisors is an integer number (2469420).

Almost surely, 2^20852690 is an apocalyptic number.

20852690 is a deficient number, since it is larger than the sum of its proper divisors (18658030).

20852690 is a wasteful number, since it uses less digits than its factorization.

20852690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109777.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 20852690 is about 4566.4745701690. The cubic root of 20852690 is about 275.2457967687.

The spelling of 20852690 in words is "twenty million, eight hundred fifty-two thousand, six hundred ninety".