20004721596 has 144 divisors (see below), whose sum is σ = 54163200000. Its totient is φ = 6207207552.

The previous prime is 20004721589. The next prime is 20004721603. The reversal of 20004721596 is 69512740002.

20004721596 is a `hidden beast` number, since 2 + 0 + 0 + 0 + 47 + 21 + 596 = 666.

It is an interprime number because it is at equal distance from previous prime (20004721589) and next prime (20004721603).

It is a super-2 number, since 2×20004721596² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 20004721596.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12913830 + ... + 12915378.

Almost surely, 2^20004721596 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 20004721596, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27081600000).

20004721596 is an abundant number, since it is smaller than the sum of its proper divisors (34158478404).

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

20004721596 is a wasteful number, since it uses less digits than its factorization.

20004721596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1896 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 20004721596 in words is "twenty billion, four million, seven hundred twenty-one thousand, five hundred ninety-six".