18453939402 has 16 divisors (see below), whose sum is σ = 38180564640. Its totient is φ = 5939198832.

The previous prime is 18453939401. The next prime is 18453939409. The reversal of 18453939402 is 20493935481.

It is not an unprimeable number, because it can be changed into a prime (18453939401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53028388 + ... + 53028735.

It is an arithmetic number, because the mean of its divisors is an integer number (2386285290).

Almost surely, 2^18453939402 is an apocalyptic number.

18453939402 is an abundant number, since it is smaller than the sum of its proper divisors (19726625238).

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

18453939402 is a wasteful number, since it uses less digits than its factorization.

18453939402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106057157.

The product of its (nonzero) digits is 933120, while the sum is 48.

The spelling of 18453939402 in words is "eighteen billion, four hundred fifty-three million, nine hundred thirty-nine thousand, four hundred two".