12642887705020 has 24 divisors (see below), whose sum is σ = 26550179815824. Its totient is φ = 5057133056256.

The previous prime is 12642887705017. The next prime is 12642887705023. The reversal of 12642887705020 is 2050778824621.

It is an interprime number because it is at equal distance from previous prime (12642887705017) and next prime (12642887705023).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642887705023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3806139 + ... + 6306541.

It is an arithmetic number, because the mean of its divisors is an integer number (1106257492326).

Almost surely, 2^{12642887705020} is an apocalyptic number.

12642887705020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12642887705020 is an abundant number, since it is smaller than the sum of its proper divisors (13907292110804).

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

12642887705020 is a wasteful number, since it uses less digits than its factorization.

12642887705020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753229 (or 2753227 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 52.

The spelling of 12642887705020 in words is "twelve trillion, six hundred forty-two billion, eight hundred eighty-seven million, seven hundred five thousand, twenty".