21090299312 has 20 divisors (see below), whose sum is σ = 40887713376. Its totient is φ = 10538631360.

The previous prime is 21090299287. The next prime is 21090299339. The reversal of 21090299312 is 21399209012.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 380648 + ... + 432519.

Almost surely, 2^21090299312 is an apocalyptic number.

It is an amenable number.

21090299312 is a deficient number, since it is larger than the sum of its proper divisors (19797414064).

21090299312 is a wasteful number, since it uses less digits than its factorization.

21090299312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814796 (or 814790 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The spelling of 21090299312 in words is "twenty-one billion, ninety million, two hundred ninety-nine thousand, three hundred twelve".