21093929092 has 12 divisors (see below), whose sum is σ = 37359128016. Its totient is φ = 10419892520.

The previous prime is 21093929057. The next prime is 21093929093. The reversal of 21093929092 is 29092939012.

It is not an unprimeable number, because it can be changed into a prime (21093929093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31767634 + ... + 31768297.

It is an arithmetic number, because the mean of its divisors is an integer number (3113260668).

Almost surely, 2^21093929092 is an apocalyptic number.

It is an amenable number.

21093929092 is a deficient number, since it is larger than the sum of its proper divisors (16265198924).

21093929092 is a wasteful number, since it uses less digits than its factorization.

21093929092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63536018 (or 63536016 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The spelling of 21093929092 in words is "twenty-one billion, ninety-three million, nine hundred twenty-nine thousand, ninety-two".