18910142836 has 24 divisors (see below), whose sum is σ = 36507578184. Its totient is φ = 8514885120.

The previous prime is 18910142789. The next prime is 18910142851. The reversal of 18910142836 is 63824101981.

It can be written as a sum of positive squares in 4 ways, for example, as 524410000 + 18385732836 = 22900^2 + 135594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 18910142792 and 18910142801.

It is a congruent number.

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, 4432705 + ... + 4436968.

It is an arithmetic number, because the mean of its divisors is an integer number (1521149091).

Almost surely, 2^18910142836 is an apocalyptic number.

It is an amenable number.

18910142836 is a deficient number, since it is larger than the sum of its proper divisors (17597435348).

18910142836 is a wasteful number, since it uses less digits than its factorization.

18910142836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8869731 (or 8869729 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 18910142836 in words is "eighteen billion, nine hundred ten million, one hundred forty-two thousand, eight hundred thirty-six".