20419693 has 4 divisors (see below), whose sum is σ = 23336800. Its totient is φ = 17502588.

The previous prime is 20419639. The next prime is 20419697. The reversal of 20419693 is 39691402.

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: 39691402 = 2 ⋅19845701.

It is a cyclic number.

It is not a de Polignac number, because 20419693 - 2¹⁷ = 20288621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20419697) 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, 1458543 + ... + 1458556.

It is an arithmetic number, because the mean of its divisors is an integer number (5834200).

Almost surely, 2^20419693 is an apocalyptic number.

It is an amenable number.

20419693 is a deficient number, since it is larger than the sum of its proper divisors (2917107).

20419693 is an equidigital number, since it uses as much as digits as its factorization.

20419693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917106.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 20419693 is about 4518.8154421264. The cubic root of 20419693 is about 273.3273366058.

It can be divided in two parts, 20419 and 693, that added together give a palindrome (21112).

The spelling of 20419693 in words is "twenty million, four hundred nineteen thousand, six hundred ninety-three".