20130072 has 32 divisors (see below), whose sum is σ = 51687600. Its totient is φ = 6528384.

The previous prime is 20130043. The next prime is 20130079. The reversal of 20130072 is 27003102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20130079) 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, 10447 + ... + 12222.

Almost surely, 2^20130072 is an apocalyptic number.

It is an amenable number.

20130072 is an abundant number, since it is smaller than the sum of its proper divisors (31557528).

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

20130072 is a wasteful number, since it uses less digits than its factorization.

20130072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22715 (or 22711 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 20130072 is about 4486.6548786373. The cubic root of 20130072 is about 272.0289401157.

Adding to 20130072 its reverse (27003102), we get a palindrome (47133174).

The spelling of 20130072 in words is "twenty million, one hundred thirty thousand, seventy-two".