19797845 has 8 divisors (see below), whose sum is σ = 24310176. Its totient is φ = 15469776.

The previous prime is 19797839. The next prime is 19797847. The reversal of 19797845 is 54879791.

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

It is a cyclic number.

It is not a de Polignac number, because 19797845 - 2⁶ = 19797781 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 19797793 and 19797802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19797847) 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 7 ways as a sum of consecutive naturals, for example, 45827 + ... + 46256.

It is an arithmetic number, because the mean of its divisors is an integer number (3038772).

Almost surely, 2^19797845 is an apocalyptic number.

It is an amenable number.

19797845 is a deficient number, since it is larger than the sum of its proper divisors (4512331).

19797845 is an equidigital number, since it uses as much as digits as its factorization.

19797845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92131.

The product of its digits is 635040, while the sum is 50.

The square root of 19797845 is about 4449.4769355510. The cubic root of 19797845 is about 270.5241077184.

The spelling of 19797845 in words is "nineteen million, seven hundred ninety-seven thousand, eight hundred forty-five".