21346112156456 has 8 divisors (see below), whose sum is σ = 40023960293370. Its totient is φ = 10673056078224.

The previous prime is 21346112156443. The next prime is 21346112156483. The reversal of 21346112156456 is 65465121164312.

It can be written as a sum of positive squares in only one way, i.e., 17427034684900 + 3919077471556 = 4174570^2 + 1979666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 21346112156456.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1334132009771 + ... + 1334132009786.

Almost surely, 2^{21346112156456} is an apocalyptic number.

It is an amenable number.

21346112156456 is a deficient number, since it is larger than the sum of its proper divisors (18677848136914).

21346112156456 is a wasteful number, since it uses less digits than its factorization.

21346112156456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668264019563 (or 2668264019559 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The spelling of 21346112156456 in words is "twenty-one trillion, three hundred forty-six billion, one hundred twelve million, one hundred fifty-six thousand, four hundred fifty-six".