16618951 has 2 divisors, whose sum is σ = 16618952. Its totient is φ = 16618950.

The previous prime is 16618933. The next prime is 16618967. The reversal of 16618951 is 15981661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16618951 - 2¹¹ = 16616903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16618951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16618051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8309475 + 8309476.

It is an arithmetic number, because the mean of its divisors is an integer number (8309476).

Almost surely, 2^16618951 is an apocalyptic number.

16618951 is a deficient number, since it is larger than the sum of its proper divisors (1).

16618951 is an equidigital number, since it uses as much as digits as its factorization.

16618951 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 37.

The square root of 16618951 is about 4076.6347641161. The cubic root of 16618951 is about 255.1924780280.

The spelling of 16618951 in words is "sixteen million, six hundred eighteen thousand, nine hundred fifty-one".