20457372 has 48 divisors (see below), whose sum is σ = 52157952. Its totient is φ = 6202560.

The previous prime is 20457347. The next prime is 20457377. The reversal of 20457372 is 27375402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20457377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10153 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (1086624).

Almost surely, 2^20457372 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20457372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26078976).

20457372 is an abundant number, since it is smaller than the sum of its proper divisors (31700580).

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

20457372 is a wasteful number, since it uses less digits than its factorization.

20457372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938 (or 1936 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 20457372 is about 4522.9826442294. The cubic root of 20457372 is about 273.4953504396.

The spelling of 20457372 in words is "twenty million, four hundred fifty-seven thousand, three hundred seventy-two".