21602474342567 has 4 divisors (see below), whose sum is σ = 21602487934536. Its totient is φ = 21602460750600.

The previous prime is 21602474342509. The next prime is 21602474342587. The reversal of 21602474342567 is 76524347420612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21602474342567 - 2⁴⁰ = 20502962714791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21602474342587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4039184 + ... + 7714917.

It is an arithmetic number, because the mean of its divisors is an integer number (5400621983634).

Almost surely, 2^{21602474342567} is an apocalyptic number.

21602474342567 is a deficient number, since it is larger than the sum of its proper divisors (13591969).

21602474342567 is a wasteful number, since it uses less digits than its factorization.

21602474342567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13591968.

The product of its (nonzero) digits is 13547520, while the sum is 53.

The spelling of 21602474342567 in words is "twenty-one trillion, six hundred two billion, four hundred seventy-four million, three hundred forty-two thousand, five hundred sixty-seven".