12635155020 has 24 divisors (see below), whose sum is σ = 35378434224. Its totient is φ = 3369374656.

The previous prime is 12635155019. The next prime is 12635155031. The reversal of 12635155020 is 2055153621.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105292899 + ... + 105293018.

It is an arithmetic number, because the mean of its divisors is an integer number (1474101426).

Almost surely, 2^12635155020 is an apocalyptic number.

12635155020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12635155020 is an abundant number, since it is smaller than the sum of its proper divisors (22743279204).

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

12635155020 is a wasteful number, since it uses less digits than its factorization.

12635155020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210585929 (or 210585927 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The spelling of 12635155020 in words is "twelve billion, six hundred thirty-five million, one hundred fifty-five thousand, twenty".