18879037 has 2 divisors, whose sum is σ = 18879038. Its totient is φ = 18879036.

The previous prime is 18879019. The next prime is 18879053. The reversal of 18879037 is 73097881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18783556 + 95481 = 4334^2 + 309^2 .

It is a cyclic number.

It is not a de Polignac number, because 18879037 - 2²³ = 10490429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18878984 and 18879002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18879437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9439518 + 9439519.

It is an arithmetic number, because the mean of its divisors is an integer number (9439519).

Almost surely, 2^18879037 is an apocalyptic number.

It is an amenable number.

18879037 is a deficient number, since it is larger than the sum of its proper divisors (1).

18879037 is an equidigital number, since it uses as much as digits as its factorization.

18879037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 18879037 is about 4345.0013808974. The cubic root of 18879037 is about 266.2726819120.

The spelling of 18879037 in words is "eighteen million, eight hundred seventy-nine thousand, thirty-seven".