21405230714612 has 12 divisors (see below), whose sum is σ = 37459187655456. Its totient is φ = 10702605670200.

The previous prime is 21405230714531. The next prime is 21405230714641. The reversal of 21405230714612 is 21641703250412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5250953 + ... + 8389455.

It is an arithmetic number, because the mean of its divisors is an integer number (3121598971288).

Almost surely, 2^{21405230714612} is an apocalyptic number.

It is an amenable number.

21405230714612 is a deficient number, since it is larger than the sum of its proper divisors (16053956940844).

21405230714612 is a wasteful number, since it uses less digits than its factorization.

21405230714612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843558 (or 4843556 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 21405230714612 in words is "twenty-one trillion, four hundred five billion, two hundred thirty million, seven hundred fourteen thousand, six hundred twelve".