20887486680 has 64 divisors (see below), whose sum is σ = 62672732640. Its totient is φ = 5569083392.

The previous prime is 20887486661. The next prime is 20887486687. The reversal of 20887486680 is 8668478802.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20887486680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20887486687) 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 15 ways as a sum of consecutive naturals, for example, 1050592 + ... + 1070288.

Almost surely, 2^20887486680 is an apocalyptic number.

20887486680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20887486680 is an abundant number, since it is smaller than the sum of its proper divisors (41785245960).

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

20887486680 is a wasteful number, since it uses less digits than its factorization.

20887486680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28548 (or 28544 counting only the distinct ones).

The product of its (nonzero) digits is 8257536, while the sum is 57.

The spelling of 20887486680 in words is "twenty billion, eight hundred eighty-seven million, four hundred eighty-six thousand, six hundred eighty".