18969494830 has 32 divisors (see below), whose sum is σ = 40114515168. Its totient is φ = 6367382400.

The previous prime is 18969494821. The next prime is 18969494833. The reversal of 18969494830 is 3849496981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18969494833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6631261 + ... + 6634120.

It is an arithmetic number, because the mean of its divisors is an integer number (1253578599).

Almost surely, 2^18969494830 is an apocalyptic number.

18969494830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18969494830 is an abundant number, since it is smaller than the sum of its proper divisors (21145020338).

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

18969494830 is a wasteful number, since it uses less digits than its factorization.

18969494830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13265412.

The product of its (nonzero) digits is 13436928, while the sum is 61.

The spelling of 18969494830 in words is "eighteen billion, nine hundred sixty-nine million, four hundred ninety-four thousand, eight hundred thirty".