21837075874 has 4 divisors (see below), whose sum is σ = 32755613814. Its totient is φ = 10918537936.

The previous prime is 21837075857. The next prime is 21837075889. The reversal of 21837075874 is 47857073812.

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., 11260393225 + 10576682649 = 106115^2 + 102843^2 .

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 as a sum of consecutive naturals, namely, 5459268967 + ... + 5459268970.

Almost surely, 2^21837075874 is an apocalyptic number.

21837075874 is a deficient number, since it is larger than the sum of its proper divisors (10918537940).

21837075874 is a wasteful number, since it uses less digits than its factorization.

21837075874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10918537939.

The product of its (nonzero) digits is 2634240, while the sum is 52.

The spelling of 21837075874 in words is "twenty-one billion, eight hundred thirty-seven million, seventy-five thousand, eight hundred seventy-four".