20454203212 has 12 divisors (see below), whose sum is σ = 36197045640. Its totient is φ = 10112190176.

The previous prime is 20454203201. The next prime is 20454203213. The reversal of 20454203212 is 21230245402.

It is a super-2 number, since 2×20454203212² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20454203213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28727458 + ... + 28728169.

It is an arithmetic number, because the mean of its divisors is an integer number (3016420470).

Almost surely, 2^20454203212 is an apocalyptic number.

It is an amenable number.

20454203212 is a deficient number, since it is larger than the sum of its proper divisors (15742842428).

20454203212 is a wasteful number, since it uses less digits than its factorization.

20454203212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57455720 (or 57455718 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20454203212 its reverse (21230245402), we get a palindrome (41684448614).

The spelling of 20454203212 in words is "twenty billion, four hundred fifty-four million, two hundred three thousand, two hundred twelve".