21099593000 has 32 divisors (see below), whose sum is σ = 49373049960. Its totient is φ = 8439836800.

The previous prime is 21099592991. The next prime is 21099593071. The reversal of 21099593000 is 39599012.

It can be written as a sum of positive squares in 4 ways, for example, as 817845604 + 20281747396 = 28598^2 + 142414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10548797 + ... + 10550796.

Almost surely, 2^21099593000 is an apocalyptic number.

21099593000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21099593000 is an abundant number, since it is smaller than the sum of its proper divisors (28273456960).

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

21099593000 is a wasteful number, since it uses less digits than its factorization.

21099593000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21099614 (or 21099600 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 38.

The spelling of 21099593000 in words is "twenty-one billion, ninety-nine million, five hundred ninety-three thousand".