21144592386 has 24 divisors (see below), whose sum is σ = 45928697724. Its totient is φ = 7030441440.

The previous prime is 21144592361. The next prime is 21144592459. The reversal of 21144592386 is 68329544112.

21144592386 is a `hidden beast` number, since 2 + 11 + 44 + 592 + 3 + 8 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19563337161 + 1581255225 = 139869^2 + 39765^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1472325 + ... + 1486616.

Almost surely, 2^21144592386 is an apocalyptic number.

21144592386 is an abundant number, since it is smaller than the sum of its proper divisors (24784105338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21144592386 is a wasteful number, since it uses less digits than its factorization.

21144592386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959346 (or 2959343 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The spelling of 21144592386 in words is "twenty-one billion, one hundred forty-four million, five hundred ninety-two thousand, three hundred eighty-six".