18764949 has 16 divisors (see below), whose sum is σ = 28958720. Its totient is φ = 10586160.

The previous prime is 18764929. The next prime is 18764953. The reversal of 18764949 is 94946781.

It is not a de Polignac number, because 18764949 - 2⁸ = 18764693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18764898 and 18764907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18764929) 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, 3997 + ... + 7314.

It is an arithmetic number, because the mean of its divisors is an integer number (1809920).

Almost surely, 2^18764949 is an apocalyptic number.

It is an amenable number.

18764949 is a deficient number, since it is larger than the sum of its proper divisors (10193771).

18764949 is a wasteful number, since it uses less digits than its factorization.

18764949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11400.

The product of its digits is 435456, while the sum is 48.

The square root of 18764949 is about 4331.8528368355. The cubic root of 18764949 is about 265.7352265758.

The spelling of 18764949 in words is "eighteen million, seven hundred sixty-four thousand, nine hundred forty-nine".