21103926512 has 10 divisors (see below), whose sum is σ = 40888857648. Its totient is φ = 10551963248.

The previous prime is 21103926509. The next prime is 21103926521. The reversal of 21103926512 is 21562930112.

It is a super-2 number, since 2×21103926512² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659497688 + ... + 659497719.

Almost surely, 2^21103926512 is an apocalyptic number.

It is an amenable number.

21103926512 is a deficient number, since it is larger than the sum of its proper divisors (19784931136).

21103926512 is a wasteful number, since it uses less digits than its factorization.

21103926512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318995415 (or 1318995409 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The spelling of 21103926512 in words is "twenty-one billion, one hundred three million, nine hundred twenty-six thousand, five hundred twelve".