20465456 has 60 divisors (see below), whose sum is σ = 45066312. Its totient is φ = 9002400.

The previous prime is 20465449. The next prime is 20465491. The reversal of 20465456 is 65456402.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 660161 + ... + 660191.

Almost surely, 2^20465456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20465456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22533156).

20465456 is an abundant number, since it is smaller than the sum of its proper divisors (24600856).

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

20465456 is an equidigital number, since it uses as much as digits as its factorization.

20465456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 44 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 20465456 is about 4523.8762140448. The cubic root of 20465456 is about 273.5313707921.

The spelling of 20465456 in words is "twenty million, four hundred sixty-five thousand, four hundred fifty-six".