20452518 has 24 divisors (see below), whose sum is σ = 44397288. Its totient is φ = 6804672.

The previous prime is 20452499. The next prime is 20452519. The reversal of 20452518 is 81525402.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20452491 and 20452500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17005 + ... + 18167.

It is an arithmetic number, because the mean of its divisors is an integer number (1849887).

Almost surely, 2^20452518 is an apocalyptic number.

20452518 is an abundant number, since it is smaller than the sum of its proper divisors (23944770).

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

20452518 is a wasteful number, since it uses less digits than its factorization.

20452518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 20452518 is about 4522.4460195783. The cubic root of 20452518 is about 273.4737176277.

The spelling of 20452518 in words is "twenty million, four hundred fifty-two thousand, five hundred eighteen".