18741057438 has 16 divisors (see below), whose sum is σ = 37502833536. Its totient is φ = 6243566040.

The previous prime is 18741057437. The next prime is 18741057497. The reversal of 18741057438 is 83475014781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18741057437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851506 + ... + 873237.

It is an arithmetic number, because the mean of its divisors is an integer number (2343927096).

Almost surely, 2^18741057438 is an apocalyptic number.

18741057438 is an abundant number, since it is smaller than the sum of its proper divisors (18761776098).

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

18741057438 is a wasteful number, since it uses less digits than its factorization.

18741057438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1726559.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 18741057438 in words is "eighteen billion, seven hundred forty-one million, fifty-seven thousand, four hundred thirty-eight".