20004721632 has 120 divisors (see below), whose sum is σ = 67238153136. Its totient is φ = 5715629568.

The previous prime is 20004721609. The next prime is 20004721637. The reversal of 20004721632 is 23612740002.

20004721632 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 4 + 7 + 21 + 632 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20004721596 and 20004721605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004721637) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 533133 + ... + 569420.

Almost surely, 2^20004721632 is an apocalyptic number.

It is an amenable number.

20004721632 is an abundant number, since it is smaller than the sum of its proper divisors (47233431504).

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

20004721632 is a wasteful number, since it uses less digits than its factorization.

20004721632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1102582 (or 1102565 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The spelling of 20004721632 in words is "twenty billion, four million, seven hundred twenty-one thousand, six hundred thirty-two".