21394849312 has 24 divisors (see below), whose sum is σ = 42334934796. Its totient is φ = 10643119872.

The previous prime is 21394849309. The next prime is 21394849321.

21394849312 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 21328849936 + 65999376 = 146044^2 + 8124^2 .

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, 1690623 + ... + 1703230.

Almost surely, 2^21394849312 is an apocalyptic number.

It is an amenable number.

21394849312 is a deficient number, since it is larger than the sum of its proper divisors (20940085484).

21394849312 is a wasteful number, since it uses less digits than its factorization.

21394849312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3394060 (or 3394052 counting only the distinct ones).

The product of its digits is 373248, while the sum is 46.

The spelling of 21394849312 in words is "twenty-one billion, three hundred ninety-four million, eight hundred forty-nine thousand, three hundred twelve".