20040220440 has 96 divisors (see below), whose sum is σ = 65520917280. Its totient is φ = 5312042496.

The previous prime is 20040220433. The next prime is 20040220471. The reversal of 20040220440 is 4402204002.

20040220440 is a `hidden beast` number, since 2 + 0 + 0 + 4 + 0 + 220 + 440 = 666.

It is a super-2 number, since 2×20040220440² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

20040220440 is a modest number, since divided by 220440 gives 20040 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 106549 + ... + 226788.

It is an arithmetic number, because the mean of its divisors is an integer number (682509555).

Almost surely, 2^20040220440 is an apocalyptic number.

20040220440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20040220440 is an abundant number, since it is smaller than the sum of its proper divisors (45480696840).

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

20040220440 is a wasteful number, since it uses less digits than its factorization.

20040220440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333521 (or 333514 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 20040220440 its reverse (4402204002), we get a palindrome (24442424442).

The spelling of 20040220440 in words is "twenty billion, forty million, two hundred twenty thousand, four hundred forty".