18876085129 has 4 divisors (see below), whose sum is σ = 20592092880. Its totient is φ = 17160077380.

The previous prime is 18876085117. The next prime is 18876085141. The reversal of 18876085129 is 92158067881.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92158067881 = 11 ⋅8378006171.

It is an interprime number because it is at equal distance from previous prime (18876085117) and next prime (18876085141).

It is a cyclic number.

It is not a de Polignac number, because 18876085129 - 2¹¹ = 18876083081 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18876085129.

It is not an unprimeable number, because it can be changed into a prime (18876085199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858003859 + ... + 858003880.

It is an arithmetic number, because the mean of its divisors is an integer number (5148023220).

Almost surely, 2^18876085129 is an apocalyptic number.

It is an amenable number.

18876085129 is a deficient number, since it is larger than the sum of its proper divisors (1716007751).

18876085129 is a wasteful number, since it uses less digits than its factorization.

18876085129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1716007750.

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 18876085129 in words is "eighteen billion, eight hundred seventy-six million, eighty-five thousand, one hundred twenty-nine".