20885190 has 32 divisors (see below), whose sum is σ = 50443776. Its totient is φ = 5533920.

The previous prime is 20885177. The next prime is 20885201. The reversal of 20885190 is 9158802.

It is a happy number.

It is a super-2 number, since 2×20885190² = 872382322672200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2755 + ... + 7025.

It is an arithmetic number, because the mean of its divisors is an integer number (1576368).

Almost surely, 2^20885190 is an apocalyptic number.

20885190 is an abundant number, since it is smaller than the sum of its proper divisors (29558586).

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

20885190 is a wasteful number, since it uses less digits than its factorization.

20885190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444.

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20885190 is about 4570.0317285551. The cubic root of 20885190 is about 275.3887174995.

The spelling of 20885190 in words is "twenty million, eight hundred eighty-five thousand, one hundred ninety".