19494745 has 16 divisors (see below), whose sum is σ = 24208128. Its totient is φ = 15059520.

The previous prime is 19494743. The next prime is 19494749. The reversal of 19494745 is 54749491.

It is not a de Polignac number, because 19494745 - 2¹ = 19494743 is a prime.

It is a Duffinian number.

Its product of digits (181440) is a multiple of the sum of its prime divisors (840).

It is not an unprimeable number, because it can be changed into a prime (19494743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30580 + ... + 31210.

It is an arithmetic number, because the mean of its divisors is an integer number (1513008).

Almost surely, 2^19494745 is an apocalyptic number.

It is an amenable number.

19494745 is a deficient number, since it is larger than the sum of its proper divisors (4713383).

19494745 is a wasteful number, since it uses less digits than its factorization.

19494745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840.

The product of its digits is 181440, while the sum is 43.

The square root of 19494745 is about 4415.2853814901. The cubic root of 19494745 is about 269.1364499857.

The spelling of 19494745 in words is "nineteen million, four hundred ninety-four thousand, seven hundred forty-five".