20254480 has 80 divisors (see below), whose sum is σ = 50983344. Its totient is φ = 7454720.

The previous prime is 20254477. The next prime is 20254483. The reversal of 20254480 is 8445202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20254477) and next prime (20254483).

It can be written as a sum of positive squares in 8 ways, for example, as 1557504 + 18696976 = 1248^2 + 4324^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20254483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71940 + ... + 72220.

Almost surely, 2^20254480 is an apocalyptic number.

20254480 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 20254480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25491672).

20254480 is an abundant number, since it is smaller than the sum of its proper divisors (30728864).

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

20254480 is a wasteful number, since it uses less digits than its factorization.

20254480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 20254480 is about 4500.4977502494. The cubic root of 20254480 is about 272.5881879372.

Adding to 20254480 its reverse (8445202), we get a palindrome (28699682).

The spelling of 20254480 in words is "twenty million, two hundred fifty-four thousand, four hundred eighty".