18825136902 has 192 divisors, whose sum is σ = 48735086400. Its totient is φ = 5176949760.

The previous prime is 18825136873. The next prime is 18825136927. The reversal of 18825136902 is 20963152881.

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, 64249468 + ... + 64249760.

It is an arithmetic number, because the mean of its divisors is an integer number (253828575).

Almost surely, 2^18825136902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18825136902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24367543200).

18825136902 is an abundant number, since it is smaller than the sum of its proper divisors (29909949498).

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

18825136902 is a wasteful number, since it uses less digits than its factorization.

18825136902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 660 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 18825136902 in words is "eighteen billion, eight hundred twenty-five million, one hundred thirty-six thousand, nine hundred two".