18822037 has 6 divisors (see below), whose sum is σ = 20381442. Its totient is φ = 17374032.

The previous prime is 18821983. The next prime is 18822059. The reversal of 18822037 is 73022881.

It can be written as a sum of positive squares in 3 ways, for example, as 1962801 + 16859236 = 1401^2 + 4106^2 .

It is not a de Polignac number, because 18822037 - 2¹¹ = 18819989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18822337) 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, 55518 + ... + 55855.

It is an arithmetic number, because the mean of its divisors is an integer number (3396907).

Almost surely, 2^18822037 is an apocalyptic number.

It is an amenable number.

18822037 is a deficient number, since it is larger than the sum of its proper divisors (1559405).

18822037 is a wasteful number, since it uses less digits than its factorization.

18822037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111399 (or 111386 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 18822037 is about 4338.4371610063. The cubic root of 18822037 is about 266.0044330013.

The spelling of 18822037 in words is "eighteen million, eight hundred twenty-two thousand, thirty-seven".