19504994 has 32 divisors (see below), whose sum is σ = 31806000. Its totient is φ = 8951040.

The previous prime is 19504951. The next prime is 19504997. The reversal of 19504994 is 49940591.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4566769 + 14938225 = 2137^2 + 3865^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19504997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130832 + ... + 130980.

Almost surely, 2^19504994 is an apocalyptic number.

19504994 is a deficient number, since it is larger than the sum of its proper divisors (12301006).

19504994 is a wasteful number, since it uses less digits than its factorization.

19504994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 19504994 is about 4416.4458561155. The cubic root of 19504994 is about 269.1836062190.

The spelling of 19504994 in words is "nineteen million, five hundred four thousand, nine hundred ninety-four".