20972748 has 12 divisors (see below), whose sum is σ = 48936440. Its totient is φ = 6990912.

The previous prime is 20972741. The next prime is 20972753. The reversal of 20972748 is 84727902.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (20972741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873853 + ... + 873876.

Almost surely, 2^20972748 is an apocalyptic number.

It is an amenable number.

20972748 is an abundant number, since it is smaller than the sum of its proper divisors (27963692).

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

20972748 is a wasteful number, since it uses less digits than its factorization.

20972748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747736 (or 1747734 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 20972748 is about 4579.6012926891. The cubic root of 20972748 is about 275.7730227992.

The spelling of 20972748 in words is "twenty million, nine hundred seventy-two thousand, seven hundred forty-eight".