20451296 has 24 divisors (see below), whose sum is σ = 42383880. Its totient is φ = 9687168.

The previous prime is 20451271. The next prime is 20451311. The reversal of 20451296 is 69215402.

It is a happy number.

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, 16211 + ... + 17426.

It is an arithmetic number, because the mean of its divisors is an integer number (1765995).

Almost surely, 2^20451296 is an apocalyptic number.

It is an amenable number.

20451296 is an abundant number, since it is smaller than the sum of its proper divisors (21932584).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20451296 is a wasteful number, since it uses less digits than its factorization.

20451296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33666 (or 33658 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20451296 is about 4522.3109136812. The cubic root of 20451296 is about 273.4682710035.

Adding to 20451296 its reverse (69215402), we get a palindrome (89666698).

The spelling of 20451296 in words is "twenty million, four hundred fifty-one thousand, two hundred ninety-six".