18261044043 has 8 divisors (see below), whose sum is σ = 26561518656. Its totient is φ = 11067299400.

The previous prime is 18261044033. The next prime is 18261044069. The reversal of 18261044043 is 34044016281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18261044043 - 2⁶ = 18261043979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 553364971 = 18261044043 / (1 + 8 + 2 + 6 + 1 + 0 + 4 + 4 + 0 + 4 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 18261043995 and 18261044013.

It is not an unprimeable number, because it can be changed into a prime (18261044033) 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, 276682453 + ... + 276682518.

It is an arithmetic number, because the mean of its divisors is an integer number (3320189832).

Almost surely, 2^18261044043 is an apocalyptic number.

18261044043 is a deficient number, since it is larger than the sum of its proper divisors (8300474613).

18261044043 is a wasteful number, since it uses less digits than its factorization.

18261044043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553364985.

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 18261044043 in words is "eighteen billion, two hundred sixty-one million, forty-four thousand, forty-three".