21619732190 has 32 divisors (see below), whose sum is σ = 45138691584. Its totient is φ = 7301844000.

The previous prime is 21619732187. The next prime is 21619732213. The reversal of 21619732190 is 9123791612.

It is a super-2 number, since 2×21619732190² (a number of 21 digits) contains 22 as substring.

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, 2300186 + ... + 2309565.

It is an arithmetic number, because the mean of its divisors is an integer number (1410584112).

Almost surely, 2^21619732190 is an apocalyptic number.

21619732190 is an abundant number, since it is smaller than the sum of its proper divisors (23518959394).

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

21619732190 is a wasteful number, since it uses less digits than its factorization.

21619732190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609832.

The product of its (nonzero) digits is 40824, while the sum is 41.

The spelling of 21619732190 in words is "twenty-one billion, six hundred nineteen million, seven hundred thirty-two thousand, one hundred ninety".