18923490231 has 8 divisors (see below), whose sum is σ = 25233563520. Its totient is φ = 12614538552.

The previous prime is 18923490169. The next prime is 18923490233. The reversal of 18923490231 is 13209432981.

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

It is not a de Polignac number, because 18923490231 - 2⁹ = 18923489719 is a prime.

It is a super-2 number, since 2×18923490231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18923490233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240211 + ... + 309108.

It is an arithmetic number, because the mean of its divisors is an integer number (3154195440).

Almost surely, 2^18923490231 is an apocalyptic number.

18923490231 is a deficient number, since it is larger than the sum of its proper divisors (6310073289).

18923490231 is a wasteful number, since it uses less digits than its factorization.

18923490231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560805.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 18923490231 in words is "eighteen billion, nine hundred twenty-three million, four hundred ninety thousand, two hundred thirty-one".