18521483442 has 384 divisors, whose sum is σ = 53049600000. Its totient is φ = 4260695040.

The previous prime is 18521483437. The next prime is 18521483467. The reversal of 18521483442 is 24438412581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 18521483394 and 18521483403.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 124305184 + ... + 124305332.

It is an arithmetic number, because the mean of its divisors is an integer number (138150000).

Almost surely, 2^18521483442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18521483442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26524800000).

18521483442 is an abundant number, since it is smaller than the sum of its proper divisors (34528116558).

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

18521483442 is a wasteful number, since it uses less digits than its factorization.

18521483442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 208 counting only the distinct ones).

The product of its digits is 245760, while the sum is 42.

The spelling of 18521483442 in words is "eighteen billion, five hundred twenty-one million, four hundred eighty-three thousand, four hundred forty-two".