20453812 has 12 divisors (see below), whose sum is σ = 35840896. Its totient is φ = 10213560.

The previous prime is 20453809. The next prime is 20453821. The reversal of 20453812 is 21835402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637 + ... + 6427.

Almost surely, 2^20453812 is an apocalyptic number.

It is an amenable number.

20453812 is a deficient number, since it is larger than the sum of its proper divisors (15387084).

20453812 is a wasteful number, since it uses less digits than its factorization.

20453812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6678 (or 6676 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20453812 is about 4522.5890814886. The cubic root of 20453812 is about 273.4794849294.

The spelling of 20453812 in words is "twenty million, four hundred fifty-three thousand, eight hundred twelve".