20433497 has 4 divisors (see below), whose sum is σ = 23352576. Its totient is φ = 17514420.

The previous prime is 20433481. The next prime is 20433533. The reversal of 20433497 is 79433402.

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: 79433402 = 2 ⋅39716701.

It is not a de Polignac number, because 20433497 - 2⁴ = 20433481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20433437) 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, 1459529 + ... + 1459542.

It is an arithmetic number, because the mean of its divisors is an integer number (5838144).

Almost surely, 2^20433497 is an apocalyptic number.

It is an amenable number.

20433497 is a deficient number, since it is larger than the sum of its proper divisors (2919079).

20433497 is an equidigital number, since it uses as much as digits as its factorization.

20433497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919078.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 20433497 is about 4520.3425755135. The cubic root of 20433497 is about 273.3889137750.

Adding to 20433497 its reverse (79433402), we get a palindrome (99866899).

The spelling of 20433497 in words is "twenty million, four hundred thirty-three thousand, four hundred ninety-seven".