18949212 has 18 divisors (see below), whose sum is σ = 47899488. Its totient is φ = 6316392.

The previous prime is 18949211. The next prime is 18949243. The reversal of 18949212 is 21294981.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 526367 = 18949212 / (1 + 8 + 9 + 4 + 9 + 2 + 1 + 2).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18949211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 263148 + ... + 263219.

Almost surely, 2^18949212 is an apocalyptic number.

18949212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18949212 is an abundant number, since it is smaller than the sum of its proper divisors (28950276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18949212 is a wasteful number, since it uses less digits than its factorization.

18949212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526377 (or 526372 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18949212 is about 4353.0692620265. The cubic root of 18949212 is about 266.6021934410.

The spelling of 18949212 in words is "eighteen million, nine hundred forty-nine thousand, two hundred twelve".