21868703320 has 32 divisors (see below), whose sum is σ = 50251492800. Its totient is φ = 8561363968.

The previous prime is 21868703317. The next prime is 21868703341. The reversal of 21868703320 is 2330786812.

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 5814265 + ... + 5818024.

It is an arithmetic number, because the mean of its divisors is an integer number (1570359150).

Almost surely, 2^21868703320 is an apocalyptic number.

21868703320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21868703320 is an abundant number, since it is smaller than the sum of its proper divisors (28382789480).

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

21868703320 is a wasteful number, since it uses less digits than its factorization.

21868703320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11632347 (or 11632343 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21868703320 in words is "twenty-one billion, eight hundred sixty-eight million, seven hundred three thousand, three hundred twenty".