20472600 has 96 divisors (see below), whose sum is σ = 64170000. Its totient is φ = 5399040.

The previous prime is 20472583. The next prime is 20472611. The reversal of 20472600 is 627402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89286 + ... + 89514.

Almost surely, 2^20472600 is an apocalyptic number.

20472600 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 20472600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32085000).

20472600 is an abundant number, since it is smaller than the sum of its proper divisors (43697400).

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

20472600 is a wasteful number, since it uses less digits than its factorization.

20472600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397 (or 388 counting only the distinct ones).

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

The square root of 20472600 is about 4524.6657335100. The cubic root of 20472600 is about 273.5631948371.

The spelling of 20472600 in words is "twenty million, four hundred seventy-two thousand, six hundred".