20402037072 has 120 divisors (see below), whose sum is σ = 58042329696. Its totient is φ = 6688459008.

The previous prime is 20402037043. The next prime is 20402037079. The reversal of 20402037072 is 27073020402.

20402037072 is a `hidden beast` number, since 204 + 0 + 20 + 370 + 72 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20402037079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7977618 + ... + 7980174.

Almost surely, 2^20402037072 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 20402037072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29021164848).

20402037072 is an abundant number, since it is smaller than the sum of its proper divisors (37640292624).

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

20402037072 is a wasteful number, since it uses less digits than its factorization.

20402037072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3465 (or 3456 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

Adding to 20402037072 its reverse (27073020402), we get a palindrome (47475057474).

The spelling of 20402037072 in words is "twenty billion, four hundred two million, thirty-seven thousand, seventy-two".