12987478020 has 96 divisors (see below), whose sum is σ = 39798218880. Its totient is φ = 3138370560.

The previous prime is 12987478013. The next prime is 12987478027. The reversal of 12987478020 is 2087478921.

It is an interprime number because it is at equal distance from previous prime (12987478013) and next prime (12987478027).

It is not an unprimeable number, because it can be changed into a prime (12987478027) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 175146 + ... + 238014.

It is an arithmetic number, because the mean of its divisors is an integer number (414564780).

Almost surely, 2^12987478020 is an apocalyptic number.

12987478020 is a gapful number since it is divisible by the number (10) 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 12987478020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19899109440).

12987478020 is an abundant number, since it is smaller than the sum of its proper divisors (26810740860).

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

12987478020 is a wasteful number, since it uses less digits than its factorization.

12987478020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63205 (or 63203 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 12987478020 in words is "twelve billion, nine hundred eighty-seven million, four hundred seventy-eight thousand, twenty".