18445051 has 4 divisors (see below), whose sum is σ = 19530072. Its totient is φ = 17360032.

The previous prime is 18445027. The next prime is 18445079. The reversal of 18445051 is 15054481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15054481 = 13 ⋅1158037.

It is a cyclic number.

It is not a de Polignac number, because 18445051 - 2¹¹ = 18443003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18445001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 542485 + ... + 542518.

It is an arithmetic number, because the mean of its divisors is an integer number (4882518).

Almost surely, 2^18445051 is an apocalyptic number.

18445051 is a deficient number, since it is larger than the sum of its proper divisors (1085021).

18445051 is a wasteful number, since it uses less digits than its factorization.

18445051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085020.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 18445051 is about 4294.7701917565. The cubic root of 18445051 is about 264.2165110539.

The spelling of 18445051 in words is "eighteen million, four hundred forty-five thousand, fifty-one".