18747969240 has 512 divisors, whose sum is σ = 79967139840. Its totient is φ = 3384115200.

The previous prime is 18747969217. The next prime is 18747969259. The reversal of 18747969240 is 4296974781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2037450 + ... + 2046630.

It is an arithmetic number, because the mean of its divisors is an integer number (156185820).

Almost surely, 2^18747969240 is an apocalyptic number.

18747969240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18747969240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39983569920).

18747969240 is an abundant number, since it is smaller than the sum of its proper divisors (61219170600).

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

18747969240 is a wasteful number, since it uses less digits than its factorization.

18747969240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9243 (or 9239 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 18747969240 in words is "eighteen billion, seven hundred forty-seven million, nine hundred sixty-nine thousand, two hundred forty".