18775369840 has 80 divisors (see below), whose sum is σ = 48653269920. Its totient is φ = 6696345600.

The previous prime is 18775369819. The next prime is 18775369843. The reversal of 18775369840 is 4896357781.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18775369843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337461 + ... + 389140.

It is an arithmetic number, because the mean of its divisors is an integer number (608165874).

Almost surely, 2^18775369840 is an apocalyptic number.

18775369840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18775369840 is an abundant number, since it is smaller than the sum of its proper divisors (29877900080).

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

18775369840 is a wasteful number, since it uses less digits than its factorization.

18775369840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726650 (or 726644 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 58.

The spelling of 18775369840 in words is "eighteen billion, seven hundred seventy-five million, three hundred sixty-nine thousand, eight hundred forty".