18751995 has 24 divisors (see below), whose sum is σ = 32761872. Its totient is φ = 9921600.

The previous prime is 18751991. The next prime is 18752039. The reversal of 18751995 is 59915781.

It is not a de Polignac number, because 18751995 - 2² = 18751991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18751995.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18751991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4305 + ... + 7485.

It is an arithmetic number, because the mean of its divisors is an integer number (1365078).

Almost surely, 2^18751995 is an apocalyptic number.

18751995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18751995 is a deficient number, since it is larger than the sum of its proper divisors (14009877).

18751995 is a wasteful number, since it uses less digits than its factorization.

18751995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323 (or 3320 counting only the distinct ones).

The product of its digits is 113400, while the sum is 45.

The square root of 18751995 is about 4330.3573755523. The cubic root of 18751995 is about 265.6740642008.

The spelling of 18751995 in words is "eighteen million, seven hundred fifty-one thousand, nine hundred ninety-five".