18285403802 has 16 divisors (see below), whose sum is σ = 27709172712. Its totient is φ = 9049075200.

The previous prime is 18285403793. The next prime is 18285403817. The reversal of 18285403802 is 20830458281.

It can be written as a sum of positive squares in 4 ways, for example, as 17468644561 + 816759241 = 132169^2 + 28579^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 18285403802.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 644018 + ... + 671810.

Almost surely, 2^18285403802 is an apocalyptic number.

18285403802 is a deficient number, since it is larger than the sum of its proper divisors (9423768910).

18285403802 is a wasteful number, since it uses less digits than its factorization.

18285403802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31153.

The product of its (nonzero) digits is 122880, while the sum is 41.

The spelling of 18285403802 in words is "eighteen billion, two hundred eighty-five million, four hundred three thousand, eight hundred two".