20462440 has 32 divisors (see below), whose sum is σ = 46322280. Its totient is φ = 8134912.

The previous prime is 20462423. The next prime is 20462459. The reversal of 20462440 is 4426402.

It can be written as a sum of positive squares in 4 ways, for example, as 17455684 + 3006756 = 4178^2 + 1734^2 .

It is a super-2 number, since 2×20462440² = 837422901507200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5442 + ... + 8398.

Almost surely, 2^20462440 is an apocalyptic number.

20462440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20462440 is an abundant number, since it is smaller than the sum of its proper divisors (25859840).

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

20462440 is a wasteful number, since it uses less digits than its factorization.

20462440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3141 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 20462440 is about 4523.5428593084. The cubic root of 20462440 is about 273.5179333336.

Adding to 20462440 its reverse (4426402), we get a palindrome (24888842).

It can be divided in two parts, 20462 and 440, that added together give a palindrome (20902).

The spelling of 20462440 in words is "twenty million, four hundred sixty-two thousand, four hundred forty".