18946129 has 4 divisors (see below), whose sum is σ = 19130176. Its totient is φ = 18762084.

The previous prime is 18946127. The next prime is 18946153. The reversal of 18946129 is 92164981.

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 a cyclic number.

It is not a de Polignac number, because 18946129 - 2¹ = 18946127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18946091 and 18946100.

It is not an unprimeable number, because it can be changed into a prime (18946127) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91869 + ... + 92074.

It is an arithmetic number, because the mean of its divisors is an integer number (4782544).

Almost surely, 2^18946129 is an apocalyptic number.

It is an amenable number.

18946129 is a deficient number, since it is larger than the sum of its proper divisors (184047).

18946129 is a wasteful number, since it uses less digits than its factorization.

18946129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184046.

The product of its digits is 31104, while the sum is 40.

The square root of 18946129 is about 4352.7151296633. The cubic root of 18946129 is about 266.5877341038.

The spelling of 18946129 in words is "eighteen million, nine hundred forty-six thousand, one hundred twenty-nine".