21365507423716 has 12 divisors (see below), whose sum is σ = 37391127141760. Its totient is φ = 10682328240360.

The previous prime is 21365507423641. The next prime is 21365507423723. The reversal of 21365507423716 is 61732470556312.

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, 106254876 + ... + 106455763.

Almost surely, 2^{21365507423716} is an apocalyptic number.

It is an amenable number.

21365507423716 is a deficient number, since it is larger than the sum of its proper divisors (16025619718044).

21365507423716 is a wasteful number, since it uses less digits than its factorization.

21365507423716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212735754 (or 212735752 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 52.

The spelling of 21365507423716 in words is "twenty-one trillion, three hundred sixty-five billion, five hundred seven million, four hundred twenty-three thousand, seven hundred sixteen".