18773455974 has 192 divisors, whose sum is σ = 49091632128. Its totient is φ = 4657201920.

The previous prime is 18773455949. The next prime is 18773455993. The reversal of 18773455974 is 47955437781.

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 95 ways as a sum of consecutive naturals, for example, 19413639 + ... + 19414605.

It is an arithmetic number, because the mean of its divisors is an integer number (255685584).

Almost surely, 2^18773455974 is an apocalyptic number.

18773455974 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 18773455974, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24545816064).

18773455974 is an abundant number, since it is smaller than the sum of its proper divisors (30318176154).

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

18773455974 is a wasteful number, since it uses less digits than its factorization.

18773455974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091 (or 1060 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 60.

The spelling of 18773455974 in words is "eighteen billion, seven hundred seventy-three million, four hundred fifty-five thousand, nine hundred seventy-four".