18914895 has 12 divisors (see below), whose sum is σ = 32785896. Its totient is φ = 10087920.

The previous prime is 18914893. The next prime is 18914923. The reversal of 18914895 is 59841981.

It is not a de Polignac number, because 18914895 - 2¹ = 18914893 is a prime.

It is a super-2 number, since 2×18914895² = 715546505722050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 420331 = 18914895 / (1 + 8 + 9 + 1 + 4 + 8 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 18914895.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18914893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210121 + ... + 210210.

It is an arithmetic number, because the mean of its divisors is an integer number (2732158).

Almost surely, 2^18914895 is an apocalyptic number.

18914895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18914895 is a deficient number, since it is larger than the sum of its proper divisors (13871001).

18914895 is a wasteful number, since it uses less digits than its factorization.

18914895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420342 (or 420339 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 18914895 is about 4349.1257742218. The cubic root of 18914895 is about 266.4411574400.

It can be divided in two parts, 1891 and 4895, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 18914895 in words is "eighteen million, nine hundred fourteen thousand, eight hundred ninety-five".