21772752374 has 4 divisors (see below), whose sum is σ = 32659128564. Its totient is φ = 10886376186.

The previous prime is 21772752347. The next prime is 21772752389. The reversal of 21772752374 is 47325727712.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5443188092 + ... + 5443188095.

It is an arithmetic number, because the mean of its divisors is an integer number (8164782141).

Almost surely, 2^21772752374 is an apocalyptic number.

21772752374 is a deficient number, since it is larger than the sum of its proper divisors (10886376190).

21772752374 is a wasteful number, since it uses less digits than its factorization.

21772752374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886376189.

The product of its digits is 1152480, while the sum is 47.

The spelling of 21772752374 in words is "twenty-one billion, seven hundred seventy-two million, seven hundred fifty-two thousand, three hundred seventy-four".