18952013 has 4 divisors (see below), whose sum is σ = 18960768. Its totient is φ = 18943260.

The previous prime is 18952007. The next prime is 18952027. The reversal of 18952013 is 31025981.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 18952013 - 2¹⁰ = 18950989 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 (18952033) 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, 1508 + ... + 6338.

It is an arithmetic number, because the mean of its divisors is an integer number (4740192).

Almost surely, 2^18952013 is an apocalyptic number.

It is an amenable number.

18952013 is a deficient number, since it is larger than the sum of its proper divisors (8755).

18952013 is an equidigital number, since it uses as much as digits as its factorization.

18952013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8754.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 18952013 is about 4353.3909771579. The cubic root of 18952013 is about 266.6153288325.

Adding to 18952013 its reverse (31025981), we get a palindrome (49977994).

The spelling of 18952013 in words is "eighteen million, nine hundred fifty-two thousand, thirteen".