20045454 has 64 divisors (see below), whose sum is σ = 47996928. Its totient is φ = 5500800.

The previous prime is 20045449. The next prime is 20045461. The reversal of 20045454 is 45454002.

It is a super-2 number, since 2×20045454² = 803640452132232, which contains 22 as substring.

20045454 is a modest number, since divided by 5454 gives 2004 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 52147 + ... + 52529.

It is an arithmetic number, because the mean of its divisors is an integer number (749952).

Almost surely, 2^20045454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20045454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23998464).

20045454 is an abundant number, since it is smaller than the sum of its proper divisors (27951474).

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

20045454 is a wasteful number, since it uses less digits than its factorization.

20045454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473.

The product of its (nonzero) digits is 3200, while the sum is 24.

The square root of 20045454 is about 4477.2149825533. The cubic root of 20045454 is about 271.6472413041.

Adding to 20045454 its reverse (45454002), we get a palindrome (65499456).

It can be divided in two parts, 200 and 45454, that added together give a palindrome (45654).

The spelling of 20045454 in words is "twenty million, forty-five thousand, four hundred fifty-four".