20423014440040 has 32 divisors (see below), whose sum is σ = 46468094661000. Its totient is φ = 8077416945664.

The previous prime is 20423014440011. The next prime is 20423014440067. The reversal of 20423014440040 is 4004441032402.

It can be written as a sum of positive squares in 4 ways, for example, as 12598339743396 + 7824674696644 = 3549414^2 + 2797262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20423014439990 and 20423014440008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2868397345 + ... + 2868404464.

Almost surely, 2^{20423014440040} is an apocalyptic number.

20423014440040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423014440040 is an abundant number, since it is smaller than the sum of its proper divisors (26045080220960).

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

20423014440040 is a wasteful number, since it uses less digits than its factorization.

20423014440040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5736801909 (or 5736801905 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 20423014440040 its reverse (4004441032402), we get a palindrome (24427455472442).

The spelling of 20423014440040 in words is "twenty trillion, four hundred twenty-three billion, fourteen million, four hundred forty thousand, forty".