19796542 has 4 divisors (see below), whose sum is σ = 29694816. Its totient is φ = 9898270.

The previous prime is 19796533. The next prime is 19796549. The reversal of 19796542 is 24569791.

It is a happy number.

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 (19796549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4949134 + ... + 4949137.

It is an arithmetic number, because the mean of its divisors is an integer number (7423704).

Almost surely, 2^19796542 is an apocalyptic number.

19796542 is a deficient number, since it is larger than the sum of its proper divisors (9898274).

19796542 is an equidigital number, since it uses as much as digits as its factorization.

19796542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9898273.

The product of its digits is 136080, while the sum is 43.

The square root of 19796542 is about 4449.3305114365. The cubic root of 19796542 is about 270.5181727182.

The spelling of 19796542 in words is "nineteen million, seven hundred ninety-six thousand, five hundred forty-two".