18975197952 has 108 divisors (see below), whose sum is σ = 55874538720. Its totient is φ = 6190454784.

The previous prime is 18975197897. The next prime is 18975197957. The reversal of 18975197952 is 25979157981.

It is a self number, because there is not a number n which added to its sum of digits gives 18975197952.

It is not an unprimeable number, because it can be changed into a prime (18975197957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20674 + ... + 195902.

It is an arithmetic number, because the mean of its divisors is an integer number (517356840).

Almost surely, 2^18975197952 is an apocalyptic number.

18975197952 is a gapful number since it is divisible by the number (12) 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 18975197952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27937269360).

18975197952 is an abundant number, since it is smaller than the sum of its proper divisors (36899340768).

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

18975197952 is a wasteful number, since it uses less digits than its factorization.

18975197952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175298 (or 175281 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 63.

The spelling of 18975197952 in words is "eighteen billion, nine hundred seventy-five million, one hundred ninety-seven thousand, nine hundred fifty-two".