21279803130 has 48 divisors (see below), whose sum is σ = 55345511520. Its totient is φ = 5672765664.

The previous prime is 21279803119. The next prime is 21279803161. The reversal of 21279803130 is 3130897212.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251361 + ... + 325179.

It is an arithmetic number, because the mean of its divisors is an integer number (1153031490).

Almost surely, 2^21279803130 is an apocalyptic number.

21279803130 is an abundant number, since it is smaller than the sum of its proper divisors (34065708390).

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

21279803130 is a wasteful number, since it uses less digits than its factorization.

21279803130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77035 (or 77032 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 21279803130 in words is "twenty-one billion, two hundred seventy-nine million, eight hundred three thousand, one hundred thirty".