19418945 has 48 divisors (see below), whose sum is σ = 29865600. Its totient is φ = 12108096.

The previous prime is 19418941. The next prime is 19418957. The reversal of 19418945 is 54981491.

It is not a de Polignac number, because 19418945 - 2² = 19418941 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19418941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 289802 + ... + 289868.

It is an arithmetic number, because the mean of its divisors is an integer number (622200).

Almost surely, 2^19418945 is an apocalyptic number.

It is an amenable number.

19418945 is a deficient number, since it is larger than the sum of its proper divisors (10446655).

19418945 is an equidigital number, since it uses as much as digits as its factorization.

19418945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 92 counting only the distinct ones).

The product of its digits is 51840, while the sum is 41.

The square root of 19418945 is about 4406.6932046604. The cubic root of 19418945 is about 268.7871756758.

The spelling of 19418945 in words is "nineteen million, four hundred eighteen thousand, nine hundred forty-five".