19740939 has 8 divisors (see below), whose sum is σ = 26376000. Its totient is φ = 13133256.

The previous prime is 19740937. The next prime is 19740971. The reversal of 19740939 is 93904791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 19740939 - 2¹ = 19740937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19740939.

It is not an unprimeable number, because it can be changed into a prime (19740937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5097 + ... + 8090.

It is an arithmetic number, because the mean of its divisors is an integer number (3297000).

Almost surely, 2^19740939 is an apocalyptic number.

19740939 is a deficient number, since it is larger than the sum of its proper divisors (6635061).

19740939 is a wasteful number, since it uses less digits than its factorization.

19740939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13689.

The product of its (nonzero) digits is 61236, while the sum is 42.

The square root of 19740939 is about 4443.0776495578. The cubic root of 19740939 is about 270.2646650339.

The spelling of 19740939 in words is "nineteen million, seven hundred forty thousand, nine hundred thirty-nine".