18962945 has 4 divisors (see below), whose sum is σ = 22755540. Its totient is φ = 15170352.

The previous prime is 18962941. The next prime is 18962953. The reversal of 18962945 is 54926981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4892944 + 14070001 = 2212^2 + 3751^2 .

It is a cyclic number.

It is not a de Polignac number, because 18962945 - 2² = 18962941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18962896 and 18962905.

It is not an unprimeable number, because it can be changed into a prime (18962941) 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, 1896290 + ... + 1896299.

It is an arithmetic number, because the mean of its divisors is an integer number (5688885).

Almost surely, 2^18962945 is an apocalyptic number.

It is an amenable number.

18962945 is a deficient number, since it is larger than the sum of its proper divisors (3792595).

18962945 is an equidigital number, since it uses as much as digits as its factorization.

18962945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792594.

The product of its digits is 155520, while the sum is 44.

The square root of 18962945 is about 4354.6463691097. The cubic root of 18962945 is about 266.6665824653. Note that the first 3 decimals are identical.

The spelling of 18962945 in words is "eighteen million, nine hundred sixty-two thousand, nine hundred forty-five".