18984620842 has 16 divisors (see below), whose sum is σ = 32136976800. Its totient is φ = 8331808240.

The previous prime is 18984620819. The next prime is 18984620869. The reversal of 18984620842 is 24802648981.

It is a self number, because there is not a number n which added to its sum of digits gives 18984620842.

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, 14877592 + ... + 14878867.

It is an arithmetic number, because the mean of its divisors is an integer number (2008561050).

Almost surely, 2^18984620842 is an apocalyptic number.

18984620842 is a deficient number, since it is larger than the sum of its proper divisors (13152355958).

18984620842 is a wasteful number, since it uses less digits than its factorization.

18984620842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29756501.

The product of its (nonzero) digits is 1769472, while the sum is 52.

The spelling of 18984620842 in words is "eighteen billion, nine hundred eighty-four million, six hundred twenty thousand, eight hundred forty-two".