21723760874 has 8 divisors (see below), whose sum is σ = 32586382308. Its totient is φ = 10861633440.

The previous prime is 21723760859. The next prime is 21723760951. The reversal of 21723760874 is 47806732712.

It can be written as a sum of positive squares in 2 ways, for example, as 21709959649 + 13801225 = 147343^2 + 3715^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19604 + ... + 209360.

Almost surely, 2^21723760874 is an apocalyptic number.

21723760874 is a deficient number, since it is larger than the sum of its proper divisors (10862621434).

21723760874 is a wasteful number, since it uses less digits than its factorization.

21723760874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247000.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 21723760874 in words is "twenty-one billion, seven hundred twenty-three million, seven hundred sixty thousand, eight hundred seventy-four".