20425460 has 48 divisors (see below), whose sum is σ = 47113920. Its totient is φ = 7376640.

The previous prime is 20425451. The next prime is 20425477. The reversal of 20425460 is 6452402.

20425460 = T₄₈₉ + T₄₉₀ + ... + T₆₂₀.

It is a congruent number.

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, 49736 + ... + 50144.

It is an arithmetic number, because the mean of its divisors is an integer number (981540).

Almost surely, 2^20425460 is an apocalyptic number.

20425460 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 20425460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23556960).

20425460 is an abundant number, since it is smaller than the sum of its proper divisors (26688460).

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

20425460 is a wasteful number, since it uses less digits than its factorization.

20425460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20425460 is about 4519.4535067860. The cubic root of 20425460 is about 273.3530655330.

Adding to 20425460 its reverse (6452402), we get a palindrome (26877862).

The spelling of 20425460 in words is "twenty million, four hundred twenty-five thousand, four hundred sixty".