18219254700 has 54 divisors (see below), whose sum is σ = 52721142124. Its totient is φ = 4857844480.

The previous prime is 18219254681. The next prime is 18219254701. The reversal of 18219254700 is 745291281.

It is not an unprimeable number, because it can be changed into a prime (18219254701) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2334004 + ... + 2341796.

Almost surely, 2^18219254700 is an apocalyptic number.

18219254700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18219254700 is an abundant number, since it is smaller than the sum of its proper divisors (34501887424).

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

18219254700 is an frugal number, since it uses more digits than its factorization.

18219254700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15603 (or 7803 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The spelling of 18219254700 in words is "eighteen billion, two hundred nineteen million, two hundred fifty-four thousand, seven hundred".