21732242574 has 16 divisors (see below), whose sum is σ = 49673697408. Its totient is φ = 6209212152.

The previous prime is 21732242479. The next prime is 21732242593. The reversal of 21732242574 is 47524223712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258717132 + ... + 258717215.

It is an arithmetic number, because the mean of its divisors is an integer number (3104606088).

Almost surely, 2^21732242574 is an apocalyptic number.

21732242574 is an abundant number, since it is smaller than the sum of its proper divisors (27941454834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21732242574 is a wasteful number, since it uses less digits than its factorization.

21732242574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517434359.

The product of its digits is 188160, while the sum is 39.

The spelling of 21732242574 in words is "twenty-one billion, seven hundred thirty-two million, two hundred forty-two thousand, five hundred seventy-four".