21974130360 has 896 divisors, whose sum is σ = 93648240000. Its totient is φ = 4636300032.

The previous prime is 21974130337. The next prime is 21974130389. The reversal of 21974130360 is 6303147912.

21974130360 is a `hidden beast` number, since 219 + 74 + 13 + 0 + 360 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 1690317714 + ... + 1690317726.

It is an arithmetic number, because the mean of its divisors is an integer number (104518125).

Almost surely, 2^21974130360 is an apocalyptic number.

21974130360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21974130360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46824120000).

21974130360 is an abundant number, since it is smaller than the sum of its proper divisors (71674109640).

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

21974130360 is an frugal number, since it uses more digits than its factorization.

21974130360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89 (or 30 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 21974130360 in words is "twenty-one billion, nine hundred seventy-four million, one hundred thirty thousand, three hundred sixty".