20147316880 has 20 divisors (see below), whose sum is σ = 46842511932. Its totient is φ = 8058926720.

The previous prime is 20147316841. The next prime is 20147316901. The reversal of 20147316880 is 8861374102.

It can be written as a sum of positive squares in 2 ways, for example, as 12075372544 + 8071944336 = 109888^2 + 89844^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125920651 + ... + 125920810.

Almost surely, 2^20147316880 is an apocalyptic number.

20147316880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20147316880 is an abundant number, since it is smaller than the sum of its proper divisors (26695195052).

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

20147316880 is a wasteful number, since it uses less digits than its factorization.

20147316880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251841474 (or 251841468 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 20147316880 in words is "twenty billion, one hundred forty-seven million, three hundred sixteen thousand, eight hundred eighty".