20740956 has 48 divisors (see below), whose sum is σ = 49637280. Its totient is φ = 6739200.

The previous prime is 20740939. The next prime is 20740981. The reversal of 20740956 is 65904702.

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, 132030 + ... + 132186.

It is an arithmetic number, because the mean of its divisors is an integer number (1034110).

Almost surely, 2^20740956 is an apocalyptic number.

It is an amenable number.

20740956 is an abundant number, since it is smaller than the sum of its proper divisors (28896324).

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

20740956 is a wasteful number, since it uses less digits than its factorization.

20740956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 372 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 20740956 is about 4554.2239734119. The cubic root of 20740956 is about 274.7533038296.

The spelling of 20740956 in words is "twenty million, seven hundred forty thousand, nine hundred fifty-six".