20895290 has 32 divisors (see below), whose sum is σ = 41126400. Its totient is φ = 7596864.

The previous prime is 20895289. The next prime is 20895317. The reversal of 20895290 is 9259802.

It is a super-2 number, since 2×20895290² = 873226288368200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20895290.

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, 7511 + ... + 9909.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^20895290 is an apocalyptic number.

20895290 is a deficient number, since it is larger than the sum of its proper divisors (20231110).

20895290 is a wasteful number, since it uses less digits than its factorization.

20895290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 20895290 is about 4571.1366201416. The cubic root of 20895290 is about 275.4331026644.

The spelling of 20895290 in words is "twenty million, eight hundred ninety-five thousand, two hundred ninety".