21180319200 has 108 divisors (see below), whose sum is σ = 74687125968. Its totient is φ = 5648083200.

The previous prime is 21180319187. The next prime is 21180319213. The reversal of 21180319200 is 291308112.

It is an interprime number because it is at equal distance from previous prime (21180319187) and next prime (21180319213).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1463656 + ... + 1478055.

Almost surely, 2^21180319200 is an apocalyptic number.

21180319200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21180319200 is an abundant number, since it is smaller than the sum of its proper divisors (53506806768).

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

21180319200 is a wasteful number, since it uses less digits than its factorization.

21180319200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2941737 (or 2941721 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21180319200 in words is "twenty-one billion, one hundred eighty million, three hundred nineteen thousand, two hundred".