18021025152 has 640 divisors, whose sum is σ = 63033062400. Its totient is φ = 5061242880.

The previous prime is 18021025103. The next prime is 18021025153. The reversal of 18021025152 is 25152012081.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18021025153) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 79387663 + ... + 79387889.

It is an arithmetic number, because the mean of its divisors is an integer number (98489160).

Almost surely, 2^18021025152 is an apocalyptic number.

18021025152 is a gapful number since it is divisible by the number (12) 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 18021025152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31516531200).

18021025152 is an abundant number, since it is smaller than the sum of its proper divisors (45012037248).

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

18021025152 is a wasteful number, since it uses less digits than its factorization.

18021025152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The spelling of 18021025152 in words is "eighteen billion, twenty-one million, twenty-five thousand, one hundred fifty-two".