20330144440 has 32 divisors (see below), whose sum is σ = 45995564160. Its totient is φ = 8087126400.

The previous prime is 20330144413. The next prime is 20330144507. The reversal of 20330144440 is 4444103302.

It is a congruent number.

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, 1396776 + ... + 1411255.

It is an arithmetic number, because the mean of its divisors is an integer number (1437361380).

Almost surely, 2^20330144440 is an apocalyptic number.

20330144440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20330144440 is an abundant number, since it is smaller than the sum of its proper divisors (25665419720).

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

20330144440 is a wasteful number, since it uses less digits than its factorization.

20330144440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808223 (or 2808219 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 20330144440 its reverse (4444103302), we get a palindrome (24774247742).

The spelling of 20330144440 in words is "twenty billion, three hundred thirty million, one hundred forty-four thousand, four hundred forty".