18042977940 has 48 divisors (see below), whose sum is σ = 54406520448. Its totient is φ = 4441348224.

The previous prime is 18042977933. The next prime is 18042977947. The reversal of 18042977940 is 4977924081.

It is an interprime number because it is at equal distance from previous prime (18042977933) and next prime (18042977947).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18042977947) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 11565232 + ... + 11566791.

It is an arithmetic number, because the mean of its divisors is an integer number (1133469176).

Almost surely, 2^18042977940 is an apocalyptic number.

18042977940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18042977940 is an abundant number, since it is smaller than the sum of its proper divisors (36363542508).

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

18042977940 is a wasteful number, since it uses less digits than its factorization.

18042977940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23132048 (or 23132046 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 18042977940 in words is "eighteen billion, forty-two million, nine hundred seventy-seven thousand, nine hundred forty".