17922520980 has 432 divisors, whose sum is σ = 71250326784. Its totient is φ = 3558297600.

The previous prime is 17922520949. The next prime is 17922521011. The reversal of 17922520980 is 8902522971.

It is a happy number.

17922520980 is a `hidden beast` number, since 17 + 9 + 22 + 520 + 98 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (17922520949) and next prime (17922521011).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3617505 + ... + 3622455.

It is an arithmetic number, because the mean of its divisors is an integer number (164931312).

Almost surely, 2^17922520980 is an apocalyptic number.

17922520980 is a gapful number since it is divisible by the number (10) 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 17922520980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35625163392).

17922520980 is an abundant number, since it is smaller than the sum of its proper divisors (53327805804).

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

17922520980 is a wasteful number, since it uses less digits than its factorization.

17922520980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016 (or 4998 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 17922520980 in words is "seventeen billion, nine hundred twenty-two million, five hundred twenty thousand, nine hundred eighty".