18953409000 has 64 divisors (see below), whose sum is σ = 59134645440. Its totient is φ = 5054241600.

The previous prime is 18953408923. The next prime is 18953409001. The reversal of 18953409000 is 90435981.

It is a self number, because there is not a number n which added to its sum of digits gives 18953409000.

It is not an unprimeable number, because it can be changed into a prime (18953409001) 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, 3155902 + ... + 3161901.

It is an arithmetic number, because the mean of its divisors is an integer number (923978835).

Almost surely, 2^18953409000 is an apocalyptic number.

18953409000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18953409000 is an abundant number, since it is smaller than the sum of its proper divisors (40181236440).

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

18953409000 is a wasteful number, since it uses less digits than its factorization.

18953409000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6317827 (or 6317813 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 18953409000 in words is "eighteen billion, nine hundred fifty-three million, four hundred nine thousand".