21879537674 has 8 divisors (see below), whose sum is σ = 32831546880. Its totient is φ = 10935688716.

The previous prime is 21879537653. The next prime is 21879537677. The reversal of 21879537674 is 47673597812.

It is a happy number.

21879537674 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (21879537677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033354 + ... + 2044085.

It is an arithmetic number, because the mean of its divisors is an integer number (4103943360).

Almost surely, 2^21879537674 is an apocalyptic number.

21879537674 is a deficient number, since it is larger than the sum of its proper divisors (10952009206).

21879537674 is a wasteful number, since it uses less digits than its factorization.

21879537674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080124.

The product of its digits is 17781120, while the sum is 59.

The spelling of 21879537674 in words is "twenty-one billion, eight hundred seventy-nine million, five hundred thirty-seven thousand, six hundred seventy-four".