20742312 has 32 divisors (see below), whose sum is σ = 54907200. Its totient is φ = 6507264.

The previous prime is 20742307. The next prime is 20742353. The reversal of 20742312 is 21324702.

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, 25012 + ... + 25827.

It is an arithmetic number, because the mean of its divisors is an integer number (1715850).

Almost surely, 2^20742312 is an apocalyptic number.

It is an amenable number.

20742312 is an abundant number, since it is smaller than the sum of its proper divisors (34164888).

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

20742312 is a wasteful number, since it uses less digits than its factorization.

20742312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50865 (or 50861 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 20742312 is about 4554.3728437624. The cubic root of 20742312 is about 274.7592912965.

The spelling of 20742312 in words is "twenty million, seven hundred forty-two thousand, three hundred twelve".