20433001145540 has 12 divisors (see below), whose sum is σ = 42909302405676. Its totient is φ = 8173200458208.

The previous prime is 20433001145527. The next prime is 20433001145551. The reversal of 20433001145540 is 4554110033402.

It can be written as a sum of positive squares in 2 ways, for example, as 2994810224704 + 17438190920836 = 1730552^2 + 4175906^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20433001145497 and 20433001145506.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510825028619 + ... + 510825028658.

It is an arithmetic number, because the mean of its divisors is an integer number (3575775200473).

Almost surely, 2^{20433001145540} is an apocalyptic number.

20433001145540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20433001145540 is an abundant number, since it is smaller than the sum of its proper divisors (22476301260136).

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

20433001145540 is a wasteful number, since it uses less digits than its factorization.

20433001145540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1021650057286 (or 1021650057284 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 20433001145540 its reverse (4554110033402), we get a palindrome (24987111178942).

The spelling of 20433001145540 in words is "twenty trillion, four hundred thirty-three billion, one million, one hundred forty-five thousand, five hundred forty".