19796641 has 4 divisors (see below), whose sum is σ = 20257072. Its totient is φ = 19336212.

The previous prime is 19796639. The next prime is 19796657. The reversal of 19796641 is 14669791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14669791 = 23 ⋅637817.

It is a cyclic number.

It is not a de Polignac number, because 19796641 - 2¹ = 19796639 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 460387 = 19796641 / (1 + 9 + 7 + 9 + 6 + 6 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19796611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230151 + ... + 230236.

It is an arithmetic number, because the mean of its divisors is an integer number (5064268).

Almost surely, 2^19796641 is an apocalyptic number.

It is an amenable number.

19796641 is a deficient number, since it is larger than the sum of its proper divisors (460431).

19796641 is an equidigital number, since it uses as much as digits as its factorization.

19796641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460430.

The product of its digits is 81648, while the sum is 43.

The square root of 19796641 is about 4449.3416366919. The cubic root of 19796641 is about 270.5186236598.

The spelling of 19796641 in words is "nineteen million, seven hundred ninety-six thousand, six hundred forty-one".