21437653474 has 8 divisors (see below), whose sum is σ = 32468679360. Its totient is φ = 10614760356.

The previous prime is 21437653427. The next prime is 21437653487. The reversal of 21437653474 is 47435673412.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52032934 + ... + 52033345.

It is an arithmetic number, because the mean of its divisors is an integer number (4058584920).

Almost surely, 2^21437653474 is an apocalyptic number.

21437653474 is a deficient number, since it is larger than the sum of its proper divisors (11031025886).

21437653474 is a wasteful number, since it uses less digits than its factorization.

21437653474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104066384.

The product of its digits is 1693440, while the sum is 46.

The spelling of 21437653474 in words is "twenty-one billion, four hundred thirty-seven million, six hundred fifty-three thousand, four hundred seventy-four".