21779269230 has 32 divisors (see below), whose sum is σ = 52340649984. Its totient is φ = 5799982496.

The previous prime is 21779269147. The next prime is 21779269283. The reversal of 21779269230 is 3296297712.

It is a self number, because there is not a number n which added to its sum of digits gives 21779269230.

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, 466254 + ... + 510833.

It is an arithmetic number, because the mean of its divisors is an integer number (1635645312).

Almost surely, 2^21779269230 is an apocalyptic number.

21779269230 is an abundant number, since it is smaller than the sum of its proper divisors (30561380754).

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

21779269230 is a wasteful number, since it uses less digits than its factorization.

21779269230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977840.

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 21779269230 in words is "twenty-one billion, seven hundred seventy-nine million, two hundred sixty-nine thousand, two hundred thirty".