18954067400 has 24 divisors (see below), whose sum is σ = 44068207170. Its totient is φ = 7581626880.

The previous prime is 18954067393. The next prime is 18954067403. The reversal of 18954067400 is 476045981.

It can be written as a sum of positive squares in 3 ways, for example, as 17818512196 + 1135555204 = 133486^2 + 33698^2 .

It is not an unprimeable number, because it can be changed into a prime (18954067403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47384969 + ... + 47385368.

Almost surely, 2^18954067400 is an apocalyptic number.

18954067400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18954067400 is an abundant number, since it is smaller than the sum of its proper divisors (25114139770).

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

18954067400 is a wasteful number, since it uses less digits than its factorization.

18954067400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94770353 (or 94770344 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 18954067400 in words is "eighteen billion, nine hundred fifty-four million, sixty-seven thousand, four hundred".