22161931740 has 144 divisors (see below), whose sum is σ = 76206093600. Its totient is φ = 5168116224.

The previous prime is 22161931739. The next prime is 22161931763. The reversal of 22161931740 is 4713916122.

22161931740 is a `hidden beast` number, since 2 + 2 + 1 + 619 + 31 + 7 + 4 + 0 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22161931695 and 22161931704.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 204775 + ... + 293694.

Almost surely, 2^22161931740 is an apocalyptic number.

22161931740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22161931740 is an abundant number, since it is smaller than the sum of its proper divisors (54044161860).

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

22161931740 is a wasteful number, since it uses less digits than its factorization.

22161931740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498516 (or 498511 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 22161931740 in words is "twenty-two billion, one hundred sixty-one million, nine hundred thirty-one thousand, seven hundred forty".