21274389586 has 8 divisors (see below), whose sum is σ = 31982658300. Its totient is φ = 10613503488.

The previous prime is 21274389571. The next prime is 21274389593. The reversal of 21274389586 is 68598347212.

It can be written as a sum of positive squares in 2 ways, for example, as 20741472361 + 532917225 = 144019^2 + 23085^2 .

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, 11844531 + ... + 11846326.

Almost surely, 2^21274389586 is an apocalyptic number.

21274389586 is a deficient number, since it is larger than the sum of its proper divisors (10708268714).

21274389586 is a wasteful number, since it uses less digits than its factorization.

21274389586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23691308.

The product of its digits is 5806080, while the sum is 55.

The spelling of 21274389586 in words is "twenty-one billion, two hundred seventy-four million, three hundred eighty-nine thousand, five hundred eighty-six".