21363499700 has 36 divisors (see below), whose sum is σ = 47233500300. Its totient is φ = 8384163840.

The previous prime is 21363499673. The next prime is 21363499711. The reversal of 21363499700 is 799436312.

It can be written as a sum of positive squares in 6 ways, for example, as 15952036 + 21347547664 = 3994^2 + 146108^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2010125 + ... + 2020724.

It is an arithmetic number, because the mean of its divisors is an integer number (1312041675).

Almost surely, 2^21363499700 is an apocalyptic number.

21363499700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21363499700 is an abundant number, since it is smaller than the sum of its proper divisors (25870000600).

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

21363499700 is a wasteful number, since it uses less digits than its factorization.

21363499700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030916 (or 4030909 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 44.

The spelling of 21363499700 in words is "twenty-one billion, three hundred sixty-three million, four hundred ninety-nine thousand, seven hundred".