18890030429 has 8 divisors (see below), whose sum is σ = 19073254200. Its totient is φ = 18707673600.

The previous prime is 18890030381. The next prime is 18890030459. The reversal of 18890030429 is 92403009881.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2381635204 + 16508395225 = 48802^2 + 128485^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18890030429 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 18890030429.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18890030459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172904 + ... + 260145.

It is an arithmetic number, because the mean of its divisors is an integer number (2384156775).

Almost surely, 2^18890030429 is an apocalyptic number.

It is an amenable number.

18890030429 is a deficient number, since it is larger than the sum of its proper divisors (183223771).

18890030429 is a wasteful number, since it uses less digits than its factorization.

18890030429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433471.

The product of its (nonzero) digits is 124416, while the sum is 44.

The spelling of 18890030429 in words is "eighteen billion, eight hundred ninety million, thirty thousand, four hundred twenty-nine".