20454500 has 48 divisors (see below), whose sum is σ = 48746880. Its totient is φ = 7436000.

The previous prime is 20454481. The next prime is 20454523. The reversal of 20454500 is 545402.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3641 + ... + 7359.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^20454500 is an apocalyptic number.

20454500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20454500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24373440).

20454500 is an abundant number, since it is smaller than the sum of its proper divisors (28292380).

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

20454500 is a wasteful number, since it uses less digits than its factorization.

20454500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3749 (or 3737 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20454500 is about 4522.6651434746. The cubic root of 20454500 is about 273.4825512165.

Adding to 20454500 its reverse (545402), we get a palindrome (20999902).

The spelling of 20454500 in words is "twenty million, four hundred fifty-four thousand, five hundred".