21373471645522 has 8 divisors (see below), whose sum is σ = 32082363801216. Its totient is φ = 10679350378452.

The previous prime is 21373471645499. The next prime is 21373471645553. The reversal of 21373471645522 is 22554617437312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21373471645522.

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, 3692718538 + ... + 3692724325.

It is an arithmetic number, because the mean of its divisors is an integer number (4010295475152).

Almost surely, 2^{21373471645522} is an apocalyptic number.

21373471645522 is a deficient number, since it is larger than the sum of its proper divisors (10708892155694).

21373471645522 is a wasteful number, since it uses less digits than its factorization.

21373471645522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7385444312.

The product of its digits is 8467200, while the sum is 52.

The spelling of 21373471645522 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred seventy-one million, six hundred forty-five thousand, five hundred twenty-two".