20774156 has 36 divisors (see below), whose sum is σ = 39967200. Its totient is φ = 9442368.

The previous prime is 20774147. The next prime is 20774161. The reversal of 20774156 is 65147702.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53210 + ... + 53598.

It is an arithmetic number, because the mean of its divisors is an integer number (1110200).

Almost surely, 2^20774156 is an apocalyptic number.

20774156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20774156 is a deficient number, since it is larger than the sum of its proper divisors (19193044).

20774156 is a wasteful number, since it uses less digits than its factorization.

20774156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 20774156 is about 4557.8674838130. The cubic root of 20774156 is about 274.8998246702.

The spelling of 20774156 in words is "twenty million, seven hundred seventy-four thousand, one hundred fifty-six".