20423541032540 has 48 divisors (see below), whose sum is σ = 45640547064000. Its totient is φ = 7650224980992.

The previous prime is 20423541032537. The next prime is 20423541032551. The reversal of 20423541032540 is 4523014532402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20423541032540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150860075 + ... + 150995394.

It is an arithmetic number, because the mean of its divisors is an integer number (950844730500).

Almost surely, 2^{20423541032540} is an apocalyptic number.

20423541032540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423541032540 is an abundant number, since it is smaller than the sum of its proper divisors (25217006031460).

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

20423541032540 is a wasteful number, since it uses less digits than its factorization.

20423541032540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301855694 (or 301855692 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 20423541032540 its reverse (4523014532402), we get a palindrome (24946555564942).

The spelling of 20423541032540 in words is "twenty trillion, four hundred twenty-three billion, five hundred forty-one million, thirty-two thousand, five hundred forty".