20462240 has 96 divisors (see below), whose sum is σ = 52254720. Its totient is φ = 7547904.

The previous prime is 20462227. The next prime is 20462317. The reversal of 20462240 is 4226402.

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

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, 161057 + ... + 161183.

It is an arithmetic number, because the mean of its divisors is an integer number (544320).

Almost surely, 2^20462240 is an apocalyptic number.

20462240 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 20462240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26127360).

20462240 is an abundant number, since it is smaller than the sum of its proper divisors (31792480).

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

20462240 is a wasteful number, since it uses less digits than its factorization.

20462240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 20462240 is about 4523.5207526881. The cubic root of 20462240 is about 273.5170422088.

Adding to 20462240 its reverse (4226402), we get a palindrome (24688642).

It can be divided in two parts, 20462 and 240, that added together give a palindrome (20702).

The spelling of 20462240 in words is "twenty million, four hundred sixty-two thousand, two hundred forty".