20403125544 has 32 divisors (see below), whose sum is σ = 51512847840. Its totient is φ = 6733704000.

The previous prime is 20403125521. The next prime is 20403125551. The reversal of 20403125544 is 44552130402.

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, 4206142 + ... + 4210989.

It is an arithmetic number, because the mean of its divisors is an integer number (1609776495).

Almost surely, 2^20403125544 is an apocalyptic number.

20403125544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20403125544 is an abundant number, since it is smaller than the sum of its proper divisors (31109722296).

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

20403125544 is a wasteful number, since it uses less digits than its factorization.

20403125544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8417241 (or 8417237 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 20403125544 its reverse (44552130402), we get a palindrome (64955255946).

The spelling of 20403125544 in words is "twenty billion, four hundred three million, one hundred twenty-five thousand, five hundred forty-four".