18923451000 has 64 divisors (see below), whose sum is σ = 59041176480. Its totient is φ = 5046252800.

The previous prime is 18923450971. The next prime is 18923451007. The reversal of 18923451000 is 15432981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18923451007) 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, 3150909 + ... + 3156908.

Almost surely, 2^18923451000 is an apocalyptic number.

18923451000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18923451000 is an abundant number, since it is smaller than the sum of its proper divisors (40117725480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18923451000 is a wasteful number, since it uses less digits than its factorization.

18923451000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6307841 (or 6307827 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

Adding to 18923451000 its reverse (15432981), we get a palindrome (18938883981).

The spelling of 18923451000 in words is "eighteen billion, nine hundred twenty-three million, four hundred fifty-one thousand".