19494645 has 16 divisors (see below), whose sum is σ = 31249152. Its totient is φ = 10377920.

The previous prime is 19494617. The next prime is 19494653. The reversal of 19494645 is 54649491.

It is not a de Polignac number, because 19494645 - 2⁶ = 19494581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 19494597 and 19494606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11524 + ... + 13106.

It is an arithmetic number, because the mean of its divisors is an integer number (1953072).

Almost surely, 2^19494645 is an apocalyptic number.

19494645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19494645 is a deficient number, since it is larger than the sum of its proper divisors (11754507).

19494645 is a wasteful number, since it uses less digits than its factorization.

19494645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2412.

The product of its digits is 155520, while the sum is 42.

The square root of 19494645 is about 4415.2740571792. The cubic root of 19494645 is about 269.1359897986.

The spelling of 19494645 in words is "nineteen million, four hundred ninety-four thousand, six hundred forty-five".