19797442 has 16 divisors (see below), whose sum is σ = 34856640. Its totient is φ = 8255088.

The previous prime is 19797439. The next prime is 19797443. The reversal of 19797442 is 24479791.

It is not an unprimeable number, because it can be changed into a prime (19797443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18592 + ... + 19627.

It is an arithmetic number, because the mean of its divisors is an integer number (2178540).

Almost surely, 2^19797442 is an apocalyptic number.

19797442 is a deficient number, since it is larger than the sum of its proper divisors (15059198).

19797442 is a wasteful number, since it uses less digits than its factorization.

19797442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38265.

The product of its digits is 127008, while the sum is 43.

The square root of 19797442 is about 4449.4316490986. The cubic root of 19797442 is about 270.5222721322.

The spelling of 19797442 in words is "nineteen million, seven hundred ninety-seven thousand, four hundred forty-two".