20308612896 has 720 divisors, whose sum is σ = 75114785592. Its totient is φ = 5328322560.

The previous prime is 20308612853. The next prime is 20308612927. The reversal of 20308612896 is 69821680302.

20308612896 is a `hidden beast` number, since 2 + 0 + 308 + 61 + 289 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19762736400 + 545876496 = 140580^2 + 23364^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 69312526 + ... + 69312818.

Almost surely, 2^20308612896 is an apocalyptic number.

20308612896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20308612896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37557392796).

20308612896 is an abundant number, since it is smaller than the sum of its proper divisors (54806172696).

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

20308612896 is a wasteful number, since it uses less digits than its factorization.

20308612896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 20308612896 in words is "twenty billion, three hundred eight million, six hundred twelve thousand, eight hundred ninety-six".