21346326722572 has 12 divisors (see below), whose sum is σ = 37356261608736. Its totient is φ = 10673109120080.

The previous prime is 21346326722551. The next prime is 21346326722587. The reversal of 21346326722572 is 27522762364312.

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, 12668308 + ... + 14254075.

It is an arithmetic number, because the mean of its divisors is an integer number (3113021800728).

Almost surely, 2^{21346326722572} is an apocalyptic number.

It is an amenable number.

21346326722572 is a deficient number, since it is larger than the sum of its proper divisors (16009934886164).

21346326722572 is a wasteful number, since it uses less digits than its factorization.

21346326722572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27120608 (or 27120606 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 52.

The spelling of 21346326722572 in words is "twenty-one trillion, three hundred forty-six billion, three hundred twenty-six million, seven hundred twenty-two thousand, five hundred seventy-two".