22170391640 has 16 divisors (see below), whose sum is σ = 49883381280. Its totient is φ = 8868156640.

The previous prime is 22170391637. The next prime is 22170391657. The reversal of 22170391640 is 4619307122.

It is a super-3 number, since 3×22170391640³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22170391640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277129856 + ... + 277129935.

It is an arithmetic number, because the mean of its divisors is an integer number (3117711330).

Almost surely, 2^22170391640 is an apocalyptic number.

22170391640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22170391640 is an abundant number, since it is smaller than the sum of its proper divisors (27712989640).

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

22170391640 is a wasteful number, since it uses less digits than its factorization.

22170391640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554259802 (or 554259798 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

Adding to 22170391640 its reverse (4619307122), we get a palindrome (26789698762).

The spelling of 22170391640 in words is "twenty-two billion, one hundred seventy million, three hundred ninety-one thousand, six hundred forty".