18876945 has 16 divisors (see below), whose sum is σ = 30260160. Its totient is φ = 10048704.

The previous prime is 18876943. The next prime is 18876967. The reversal of 18876945 is 54967881.

It is not a de Polignac number, because 18876945 - 2¹ = 18876943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18876894 and 18876903.

It is not an unprimeable number, because it can be changed into a prime (18876943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11166 + ... + 12744.

It is an arithmetic number, because the mean of its divisors is an integer number (1891260).

Almost surely, 2^18876945 is an apocalyptic number.

18876945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18876945 is a deficient number, since it is larger than the sum of its proper divisors (11383215).

18876945 is a wasteful number, since it uses less digits than its factorization.

18876945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384.

The product of its digits is 483840, while the sum is 48.

The square root of 18876945 is about 4344.7606378257. The cubic root of 18876945 is about 266.2628462580.

The spelling of 18876945 in words is "eighteen million, eight hundred seventy-six thousand, nine hundred forty-five".