20425110440 has 64 divisors (see below), whose sum is σ = 54805282560. Its totient is φ = 6698419200.

The previous prime is 20425110427. The next prime is 20425110457. The reversal of 20425110440 is 4401152402.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1579361 + ... + 1592240.

It is an arithmetic number, because the mean of its divisors is an integer number (856332540).

Almost surely, 2^20425110440 is an apocalyptic number.

20425110440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20425110440 is an abundant number, since it is smaller than the sum of its proper divisors (34380172120).

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

20425110440 is a wasteful number, since it uses less digits than its factorization.

20425110440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171642 (or 3171638 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 20425110440 its reverse (4401152402), we get a palindrome (24826262842).

The spelling of 20425110440 in words is "twenty billion, four hundred twenty-five million, one hundred ten thousand, four hundred forty".