18542497974 has 384 divisors, whose sum is σ = 54054604800. Its totient is φ = 4156427520.

The previous prime is 18542497973. The next prime is 18542497979. The reversal of 18542497974 is 47979424581.

It is a super-2 number, since 2×18542497974² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18542497973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 111032839 + ... + 111033005.

It is an arithmetic number, because the mean of its divisors is an integer number (140767200).

Almost surely, 2^18542497974 is an apocalyptic number.

18542497974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18542497974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27027302400).

18542497974 is an abundant number, since it is smaller than the sum of its proper divisors (35512106826).

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

18542497974 is a wasteful number, since it uses less digits than its factorization.

18542497974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 361 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 60.

The spelling of 18542497974 in words is "eighteen billion, five hundred forty-two million, four hundred ninety-seven thousand, nine hundred seventy-four".