18874061 has 2 divisors, whose sum is σ = 18874062. Its totient is φ = 18874060.

The previous prime is 18874057. The next prime is 18874067. The reversal of 18874061 is 16047881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12145225 + 6728836 = 3485^2 + 2594^2 .

It is a cyclic number.

It is not a de Polignac number, because 18874061 - 2² = 18874057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18874067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9437030 + 9437031.

It is an arithmetic number, because the mean of its divisors is an integer number (9437031).

Almost surely, 2^18874061 is an apocalyptic number.

It is an amenable number.

18874061 is a deficient number, since it is larger than the sum of its proper divisors (1).

18874061 is an equidigital number, since it uses as much as digits as its factorization.

18874061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 18874061 is about 4344.4287311452. The cubic root of 18874061 is about 266.2492857806.

The spelling of 18874061 in words is "eighteen million, eight hundred seventy-four thousand, sixty-one".