18948312 has 24 divisors (see below), whose sum is σ = 51318540. Its totient is φ = 6316080.

The previous prime is 18948311. The next prime is 18948313. The reversal of 18948312 is 21384981.

It is an interprime number because it is at equal distance from previous prime (18948311) and next prime (18948313).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18948311) 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, 131514 + ... + 131657.

Almost surely, 2^18948312 is an apocalyptic number.

18948312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18948312 is an abundant number, since it is smaller than the sum of its proper divisors (32370228).

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

18948312 is a wasteful number, since it uses less digits than its factorization.

18948312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263183 (or 263176 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 18948312 is about 4352.9658854625. The cubic root of 18948312 is about 266.5979725835.

The spelling of 18948312 in words is "eighteen million, nine hundred forty-eight thousand, three hundred twelve".