18879892 has 6 divisors (see below), whose sum is σ = 33039818. Its totient is φ = 9439944.

The previous prime is 18879869. The next prime is 18879893. The reversal of 18879892 is 29897881.

It can be written as a sum of positive squares in only one way, i.e., 11062276 + 7817616 = 3326^2 + 2796^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18879893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2359983 + ... + 2359990.

Almost surely, 2^18879892 is an apocalyptic number.

It is an amenable number.

18879892 is a deficient number, since it is larger than the sum of its proper divisors (14159926).

18879892 is a wasteful number, since it uses less digits than its factorization.

18879892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4719977 (or 4719975 counting only the distinct ones).

The product of its digits is 580608, while the sum is 52.

The square root of 18879892 is about 4345.0997687050. The cubic root of 18879892 is about 266.2767015327.

The spelling of 18879892 in words is "eighteen million, eight hundred seventy-nine thousand, eight hundred ninety-two".