18872949 has 8 divisors (see below), whose sum is σ = 26258112. Its totient is φ = 12034880.

The previous prime is 18872927. The next prime is 18872957. The reversal of 18872949 is 94927881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18872949 - 2⁹ = 18872437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18872898 and 18872907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136692 + ... + 136829.

It is an arithmetic number, because the mean of its divisors is an integer number (3282264).

Almost surely, 2^18872949 is an apocalyptic number.

It is an amenable number.

18872949 is a deficient number, since it is larger than the sum of its proper divisors (7385163).

18872949 is a wasteful number, since it uses less digits than its factorization.

18872949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273547.

The product of its digits is 290304, while the sum is 48.

The square root of 18872949 is about 4344.3007492576. The cubic root of 18872949 is about 266.2440568225.

It can be divided in two parts, 188 and 72949, that added together give a palindrome (73137).

The spelling of 18872949 in words is "eighteen million, eight hundred seventy-two thousand, nine hundred forty-nine".