18680640429 has 16 divisors (see below), whose sum is σ = 27175166784. Its totient is φ = 11320214400.

The previous prime is 18680640409. The next prime is 18680640449. The reversal of 18680640429 is 92404608681.

It is an interprime number because it is at equal distance from previous prime (18680640409) and next prime (18680640449).

It is not a de Polignac number, because 18680640429 - 2⁵ = 18680640397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18680640409) 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, 282297 + ... + 342129.

It is an arithmetic number, because the mean of its divisors is an integer number (1698447924).

Almost surely, 2^18680640429 is an apocalyptic number.

It is an amenable number.

18680640429 is a deficient number, since it is larger than the sum of its proper divisors (8494526355).

18680640429 is a wasteful number, since it uses less digits than its factorization.

18680640429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69308.

The product of its (nonzero) digits is 663552, while the sum is 48.

The spelling of 18680640429 in words is "eighteen billion, six hundred eighty million, six hundred forty thousand, four hundred twenty-nine".