20454513 has 8 divisors (see below), whose sum is σ = 28152576. Its totient is φ = 13196400.

The previous prime is 20454481. The next prime is 20454523. The reversal of 20454513 is 31545402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20454513 - 2⁵ = 20454481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20454523) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 109878 + ... + 110063.

It is an arithmetic number, because the mean of its divisors is an integer number (3519072).

Almost surely, 2^20454513 is an apocalyptic number.

It is an amenable number.

20454513 is a deficient number, since it is larger than the sum of its proper divisors (7698063).

20454513 is a wasteful number, since it uses less digits than its factorization.

20454513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219975.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20454513 is about 4522.6665806800. Note that the first 3 decimals coincide. The cubic root of 20454513 is about 273.4826091544.

Adding to 20454513 its reverse (31545402), we get a palindrome (51999915).

The spelling of 20454513 in words is "twenty million, four hundred fifty-four thousand, five hundred thirteen".