Adding to 20433494 its reverse (49433402), we get a palindrome (69866896).
It is a semiprime because it is the product of two primes.
It is a congruent number.
It is an unprimeable number.
Almost surely, 220433494 is an apocalyptic number.
20433494 is a wasteful number, since it uses less digits than its factorization.
20433494 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 10216749.
The square root of 20433494 is about 4520.3422436802. The cubic root of 20433494 is about 273.3889003956.
The spelling of 20433494 in words is "twenty million, four hundred thirty-three thousand, four hundred ninety-four".