18351259416 has 384 divisors, whose sum is σ = 62000640000. Its totient is φ = 4784541696.

The previous prime is 18351259387. The next prime is 18351259439. The reversal of 18351259416 is 61495215381.

It is a happy number.

18351259416 is a `hidden beast` number, since 1 + 8 + 3 + 51 + 2 + 594 + 1 + 6 = 666.

It is a super-2 number, since 2×18351259416² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 80136390 + ... + 80136618.

It is an arithmetic number, because the mean of its divisors is an integer number (161460000).

Almost surely, 2^18351259416 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18351259416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31000320000).

18351259416 is an abundant number, since it is smaller than the sum of its proper divisors (43649380584).

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

18351259416 is a wasteful number, since it uses less digits than its factorization.

18351259416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 504 counting only the distinct ones).

The product of its digits is 259200, while the sum is 45.

The spelling of 18351259416 in words is "eighteen billion, three hundred fifty-one million, two hundred fifty-nine thousand, four hundred sixteen".