20051396688 has 320 divisors, whose sum is σ = 58624819200. Its totient is φ = 5880483840.

The previous prime is 20051396641. The next prime is 20051396713. The reversal of 20051396688 is 88669315002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 88332031 + ... + 88332257.

It is an arithmetic number, because the mean of its divisors is an integer number (183202560).

Almost surely, 2^20051396688 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 20051396688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29312409600).

20051396688 is an abundant number, since it is smaller than the sum of its proper divisors (38573422512).

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

20051396688 is a wasteful number, since it uses less digits than its factorization.

20051396688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410 (or 404 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 20051396688 in words is "twenty billion, fifty-one million, three hundred ninety-six thousand, six hundred eighty-eight".