20033430440 has 32 divisors (see below), whose sum is σ = 45080097480. Its totient is φ = 8012504832.

The previous prime is 20033430419. The next prime is 20033430451. The reversal of 20033430440 is 4403433002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15970387876 + 4063042564 = 126374^2 + 63742^2 .

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, 451322 + ... + 493718.

Almost surely, 2^20033430440 is an apocalyptic number.

20033430440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20033430440 is an abundant number, since it is smaller than the sum of its proper divisors (25046667040).

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

20033430440 is a wasteful number, since it uses less digits than its factorization.

20033430440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54221 (or 54217 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 20033430440 its reverse (4403433002), we get a palindrome (24436863442).

The spelling of 20033430440 in words is "twenty billion, thirty-three million, four hundred thirty thousand, four hundred forty".