18353503542 has 32 divisors (see below), whose sum is σ = 40114465920. Its totient is φ = 5551881920.

The previous prime is 18353503541. The next prime is 18353503577. The reversal of 18353503542 is 24530535381.

It is a self number, because there is not a number n which added to its sum of digits gives 18353503542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353503541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206808 + ... + 281915.

It is an arithmetic number, because the mean of its divisors is an integer number (1253577060).

Almost surely, 2^18353503542 is an apocalyptic number.

18353503542 is an abundant number, since it is smaller than the sum of its proper divisors (21760962378).

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

18353503542 is a wasteful number, since it uses less digits than its factorization.

18353503542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489308.

The product of its (nonzero) digits is 216000, while the sum is 39.

The spelling of 18353503542 in words is "eighteen billion, three hundred fifty-three million, five hundred three thousand, five hundred forty-two".