21130684190 has 32 divisors (see below), whose sum is σ = 47420550144. Its totient is φ = 6586187040.

The previous prime is 21130684189. The next prime is 21130684213. The reversal of 21130684190 is 9148603112.

It is a super-2 number, since 2×21130684190² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 21130684190.

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, 13720454 + ... + 13721993.

It is an arithmetic number, because the mean of its divisors is an integer number (1481892192).

Almost surely, 2^21130684190 is an apocalyptic number.

21130684190 is an abundant number, since it is smaller than the sum of its proper divisors (26289865954).

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

21130684190 is a wasteful number, since it uses less digits than its factorization.

21130684190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27442472.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 21130684190 in words is "twenty-one billion, one hundred thirty million, six hundred eighty-four thousand, one hundred ninety".