21385274700 has 54 divisors (see below), whose sum is σ = 61882057524. Its totient is φ = 5702064480.

The previous prime is 21385274681. The next prime is 21385274723. The reversal of 21385274700 is 747258312.

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, 2528679 + ... + 2537121.

Almost surely, 2^21385274700 is an apocalyptic number.

21385274700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21385274700 is an abundant number, since it is smaller than the sum of its proper divisors (40496782824).

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

21385274700 is an frugal number, since it uses more digits than its factorization.

21385274700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16903 (or 8453 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 21385274700 in words is "twenty-one billion, three hundred eighty-five million, two hundred seventy-four thousand, seven hundred".