21199699752 has 64 divisors (see below), whose sum is σ = 66076992000. Its totient is φ = 5506415040.

The previous prime is 21199699751. The next prime is 21199699789. The reversal of 21199699752 is 25799699112.

It is not an unprimeable number, because it can be changed into a prime (21199699751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5734002 + ... + 5737697.

It is an arithmetic number, because the mean of its divisors is an integer number (1032453000).

Almost surely, 2^21199699752 is an apocalyptic number.

21199699752 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21199699752 is an abundant number, since it is smaller than the sum of its proper divisors (44877292248).

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

21199699752 is a wasteful number, since it uses less digits than its factorization.

21199699752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11471726 (or 11471722 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 60.

The spelling of 21199699752 in words is "twenty-one billion, one hundred ninety-nine million, six hundred ninety-nine thousand, seven hundred fifty-two".