21459661190 has 16 divisors (see below), whose sum is σ = 42138971280. Its totient is φ = 7803513120.

The previous prime is 21459661163. The next prime is 21459661213. The reversal of 21459661190 is 9116695412.

It is a super-2 number, since 2×21459661190² (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 7 ways as a sum of consecutive naturals, for example, 97543805 + ... + 97544024.

It is an arithmetic number, because the mean of its divisors is an integer number (2633685705).

Almost surely, 2^21459661190 is an apocalyptic number.

21459661190 is a deficient number, since it is larger than the sum of its proper divisors (20679310090).

21459661190 is a wasteful number, since it uses less digits than its factorization.

21459661190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195087847.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 21459661190 in words is "twenty-one billion, four hundred fifty-nine million, six hundred sixty-one thousand, one hundred ninety".