20987662080 has 288 divisors, whose sum is σ = 83570231808. Its totient is φ = 4361011200.

The previous prime is 20987662063. The next prime is 20987662139. The reversal of 20987662080 is 8026678902.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 260190 + ... + 331170.

It is an arithmetic number, because the mean of its divisors is an integer number (290174416).

Almost surely, 2^20987662080 is an apocalyptic number.

20987662080 is a gapful number since it is divisible by the number (20) 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 20987662080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41785115904).

20987662080 is an abundant number, since it is smaller than the sum of its proper divisors (62582569728).

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

20987662080 is a wasteful number, since it uses less digits than its factorization.

20987662080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71023 (or 71009 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 48.

The spelling of 20987662080 in words is "twenty billion, nine hundred eighty-seven million, six hundred sixty-two thousand, eighty".