19740494 has 4 divisors (see below), whose sum is σ = 29610744. Its totient is φ = 9870246.

The previous prime is 19740493. The next prime is 19740559. The reversal of 19740494 is 49404791.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19740491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4935122 + ... + 4935125.

It is an arithmetic number, because the mean of its divisors is an integer number (7402686).

Almost surely, 2^19740494 is an apocalyptic number.

19740494 is a deficient number, since it is larger than the sum of its proper divisors (9870250).

19740494 is an equidigital number, since it uses as much as digits as its factorization.

19740494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9870249.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 19740494 is about 4443.0275713752. The cubic root of 19740494 is about 270.2626342511.

The spelling of 19740494 in words is "nineteen million, seven hundred forty thousand, four hundred ninety-four".