21270059700 has 36 divisors (see below), whose sum is σ = 61541373600. Its totient is φ = 5672015840.

The previous prime is 21270059651. The next prime is 21270059731. The reversal of 21270059700 is 795007212.

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, 35449800 + ... + 35450399.

It is an arithmetic number, because the mean of its divisors is an integer number (1709482600).

Almost surely, 2^21270059700 is an apocalyptic number.

21270059700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21270059700 is an abundant number, since it is smaller than the sum of its proper divisors (40271313900).

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

21270059700 is a wasteful number, since it uses less digits than its factorization.

21270059700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70900216 (or 70900209 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The spelling of 21270059700 in words is "twenty-one billion, two hundred seventy million, fifty-nine thousand, seven hundred".