21374217562 has 4 divisors (see below), whose sum is σ = 32061326346. Its totient is φ = 10687108780.

The previous prime is 21374217509. The next prime is 21374217581. The reversal of 21374217562 is 26571247312.

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

It can be written as a sum of positive squares in only one way, i.e., 17553865081 + 3820352481 = 132491^2 + 61809^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343554389 + ... + 5343554392.

Almost surely, 2^21374217562 is an apocalyptic number.

21374217562 is a deficient number, since it is larger than the sum of its proper divisors (10687108784).

21374217562 is a wasteful number, since it uses less digits than its factorization.

21374217562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10687108783.

The product of its digits is 141120, while the sum is 40.

The spelling of 21374217562 in words is "twenty-one billion, three hundred seventy-four million, two hundred seventeen thousand, five hundred sixty-two".