21194463320 has 32 divisors (see below), whose sum is σ = 47714389200. Its totient is φ = 8473012608.

The previous prime is 21194463299. The next prime is 21194463337. The reversal of 21194463320 is 2336449112.

It is a congruent number.

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, 76775 + ... + 219734.

Almost surely, 2^21194463320 is an apocalyptic number.

21194463320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21194463320 is an abundant number, since it is smaller than the sum of its proper divisors (26519925880).

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

21194463320 is a wasteful number, since it uses less digits than its factorization.

21194463320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298307 (or 298303 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 21194463320 in words is "twenty-one billion, one hundred ninety-four million, four hundred sixty-three thousand, three hundred twenty".