18881039359 has 16 divisors (see below), whose sum is σ = 23276180032. Its totient is φ = 14914430208.

The previous prime is 18881039339. The next prime is 18881039371. The reversal of 18881039359 is 95393018881.

It is a cyclic number.

It is not a de Polignac number, because 18881039359 - 2⁷ = 18881039231 is a prime.

It is a super-2 number, since 2×18881039359² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18881039339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113454 + ... + 225019.

It is an arithmetic number, because the mean of its divisors is an integer number (1454761252).

Almost surely, 2^18881039359 is an apocalyptic number.

18881039359 is a deficient number, since it is larger than the sum of its proper divisors (4395140673).

18881039359 is a wasteful number, since it uses less digits than its factorization.

18881039359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339106.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 18881039359 in words is "eighteen billion, eight hundred eighty-one million, thirty-nine thousand, three hundred fifty-nine".