18649417629 has 4 divisors (see below), whose sum is σ = 24865890176. Its totient is φ = 12432945084.

The previous prime is 18649417613. The next prime is 18649417637. The reversal of 18649417629 is 92671494681.

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.

It is not a de Polignac number, because 18649417629 - 2⁴ = 18649417613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18649417609) 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, 3108236269 + ... + 3108236274.

It is an arithmetic number, because the mean of its divisors is an integer number (6216472544).

Almost surely, 2^18649417629 is an apocalyptic number.

It is an amenable number.

18649417629 is a deficient number, since it is larger than the sum of its proper divisors (6216472547).

18649417629 is an equidigital number, since it uses as much as digits as its factorization.

18649417629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6216472546.

The product of its digits is 5225472, while the sum is 57.

The spelling of 18649417629 in words is "eighteen billion, six hundred forty-nine million, four hundred seventeen thousand, six hundred twenty-nine".