20474560 has 56 divisors (see below), whose sum is σ = 49286160. Its totient is φ = 8100864.

The previous prime is 20474549. The next prime is 20474581. The reversal of 20474560 is 6547402.

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, 34587 + ... + 35173.

It is an arithmetic number, because the mean of its divisors is an integer number (880110).

Almost surely, 2^20474560 is an apocalyptic number.

20474560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20474560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24643080).

20474560 is an abundant number, since it is smaller than the sum of its proper divisors (28811600).

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

20474560 is a wasteful number, since it uses less digits than its factorization.

20474560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 703 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 20474560 is about 4524.8823189117. The cubic root of 20474560 is about 273.5719246638.

The spelling of 20474560 in words is "twenty million, four hundred seventy-four thousand, five hundred sixty".