20204507136 has 416 divisors, whose sum is σ = 62881717248. Its totient is φ = 5709496320.

The previous prime is 20204507101. The next prime is 20204507173. The reversal of 20204507136 is 63170540202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 208293840 + ... + 208293936.

Almost surely, 2^20204507136 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 20204507136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31440858624).

20204507136 is an abundant number, since it is smaller than the sum of its proper divisors (42677210112).

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

20204507136 is a wasteful number, since it uses less digits than its factorization.

20204507136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20204507136 in words is "twenty billion, two hundred four million, five hundred seven thousand, one hundred thirty-six".