20865274 has 16 divisors (see below), whose sum is σ = 32450688. Its totient is φ = 10055232.

The previous prime is 20865259. The next prime is 20865281. The reversal of 20865274 is 47256802.

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, 4642 + ... + 7954.

It is an arithmetic number, because the mean of its divisors is an integer number (2028168).

Almost surely, 2^20865274 is an apocalyptic number.

20865274 is a deficient number, since it is larger than the sum of its proper divisors (11585414).

20865274 is a wasteful number, since it uses less digits than its factorization.

20865274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3429.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 20865274 is about 4567.8522305346. The cubic root of 20865274 is about 275.3011532814.

The spelling of 20865274 in words is "twenty million, eight hundred sixty-five thousand, two hundred seventy-four".