21270434360 has 64 divisors (see below), whose sum is σ = 55237014720. Its totient is φ = 7220505600.

The previous prime is 21270434359. The next prime is 21270434377. The reversal of 21270434360 is 6343407212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 347789 + ... + 404348.

It is an arithmetic number, because the mean of its divisors is an integer number (863078355).

Almost surely, 2^21270434360 is an apocalyptic number.

21270434360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21270434360 is an abundant number, since it is smaller than the sum of its proper divisors (33966580360).

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

21270434360 is a wasteful number, since it uses less digits than its factorization.

21270434360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752256 (or 752252 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 32.

The spelling of 21270434360 in words is "twenty-one billion, two hundred seventy million, four hundred thirty-four thousand, three hundred sixty".