21487415414136 has 128 divisors (see below), whose sum is σ = 64625609356800. Its totient is φ = 5815980195840.

The previous prime is 21487415414093. The next prime is 21487415414177. The reversal of 21487415414136 is 63141451478412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153762216 + ... + 153901896.

It is an arithmetic number, because the mean of its divisors is an integer number (504887573100).

Almost surely, 2^{21487415414136} is an apocalyptic number.

It is an amenable number.

21487415414136 is an abundant number, since it is smaller than the sum of its proper divisors (43138193942664).

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

21487415414136 is a wasteful number, since it uses less digits than its factorization.

21487415414136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187909 (or 187905 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 51.

The spelling of 21487415414136 in words is "twenty-one trillion, four hundred eighty-seven billion, four hundred fifteen million, four hundred fourteen thousand, one hundred thirty-six".