18406051 has 2 divisors, whose sum is σ = 18406052. Its totient is φ = 18406050.

The previous prime is 18406043. The next prime is 18406099. The reversal of 18406051 is 15060481.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18406051 - 2³ = 18406043 is a prime.

It is not a weakly prime, because it can be changed into another prime (18406351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9203025 + 9203026.

It is an arithmetic number, because the mean of its divisors is an integer number (9203026).

Almost surely, 2^18406051 is an apocalyptic number.

18406051 is a deficient number, since it is larger than the sum of its proper divisors (1).

18406051 is an equidigital number, since it uses as much as digits as its factorization.

18406051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 18406051 is about 4290.2273832514. The cubic root of 18406051 is about 264.0301608868.

The spelling of 18406051 in words is "eighteen million, four hundred six thousand, fifty-one".