20887142080 has 56 divisors (see below), whose sum is σ = 56842871328. Its totient is φ = 7161305088.

The previous prime is 20887142047. The next prime is 20887142083. The reversal of 20887142080 is 8024178802.

It is a tau number, because it is divible by the number of its divisors (56).

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

It is not an unprimeable number, because it can be changed into a prime (20887142083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4660069 + ... + 4664548.

Almost surely, 2^20887142080 is an apocalyptic number.

20887142080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20887142080 is an abundant number, since it is smaller than the sum of its proper divisors (35955729248).

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

20887142080 is an equidigital number, since it uses as much as digits as its factorization.

20887142080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9324641 (or 9324631 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 20887142080 in words is "twenty billion, eight hundred eighty-seven million, one hundred forty-two thousand, eighty".