20298972 has 24 divisors (see below), whose sum is σ = 49424256. Its totient is φ = 6472048.

The previous prime is 20298953. The next prime is 20298979. The reversal of 20298972 is 27989202.

It is a self number, because there is not a number n which added to its sum of digits gives 20298972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20298979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36498 + ... + 37049.

It is an arithmetic number, because the mean of its divisors is an integer number (2059344).

Almost surely, 2^20298972 is an apocalyptic number.

It is an amenable number.

20298972 is an abundant number, since it is smaller than the sum of its proper divisors (29125284).

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

20298972 is a wasteful number, since it uses less digits than its factorization.

20298972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73577 (or 73575 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 20298972 is about 4505.4380475155. The cubic root of 20298972 is about 272.7876355682.

The spelling of 20298972 in words is "twenty million, two hundred ninety-eight thousand, nine hundred seventy-two".