21130590779 has 8 divisors (see below), whose sum is σ = 21335062320. Its totient is φ = 20926312416.

The previous prime is 21130590763. The next prime is 21130590787. The reversal of 21130590779 is 97709503112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21130590779 - 2⁴ = 21130590763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130590979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176564 + ... + 270990.

It is an arithmetic number, because the mean of its divisors is an integer number (2666882790).

Almost surely, 2^21130590779 is an apocalyptic number.

21130590779 is a deficient number, since it is larger than the sum of its proper divisors (204471541).

21130590779 is a wasteful number, since it uses less digits than its factorization.

21130590779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96589.

The product of its (nonzero) digits is 119070, while the sum is 44.

The spelling of 21130590779 in words is "twenty-one billion, one hundred thirty million, five hundred ninety thousand, seven hundred seventy-nine".