20034440 has 16 divisors (see below), whose sum is σ = 45077580. Its totient is φ = 8013760.

The previous prime is 20034433. The next prime is 20034451. The reversal of 20034440 is 4443002.

It can be written as a sum of positive squares in 2 ways, for example, as 16957924 + 3076516 = 4118^2 + 1754^2 .

It is a super-2 number, since 2×20034440² = 802757572227200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250391 + ... + 250470.

Almost surely, 2^20034440 is an apocalyptic number.

20034440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20034440 is an abundant number, since it is smaller than the sum of its proper divisors (25043140).

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

20034440 is a wasteful number, since it uses less digits than its factorization.

20034440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500872 (or 500868 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 20034440 is about 4475.9848078384. The cubic root of 20034440 is about 271.5974798826.

Adding to 20034440 its reverse (4443002), we get a palindrome (24477442).

The spelling of 20034440 in words is "twenty million, thirty-four thousand, four hundred forty".