20123302305440 has 24 divisors (see below), whose sum is σ = 47541301696980. Its totient is φ = 8049320922112.

The previous prime is 20123302305409. The next prime is 20123302305467. The reversal of 20123302305440 is 4450320332102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19274523356176 + 848778949264 = 4390276^2 + 921292^2 .

It is a super-2 number, since 2×20123302305440² (a number of 27 digits) contains 22 as substring.

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, 62885319545 + ... + 62885319864.

Almost surely, 2^{20123302305440} is an apocalyptic number.

20123302305440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20123302305440 is an abundant number, since it is smaller than the sum of its proper divisors (27417999391540).

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

20123302305440 is a wasteful number, since it uses less digits than its factorization.

20123302305440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125770639424 (or 125770639416 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 29.

Adding to 20123302305440 its reverse (4450320332102), we get a palindrome (24573622637542).

The spelling of 20123302305440 in words is "twenty trillion, one hundred twenty-three billion, three hundred two million, three hundred five thousand, four hundred forty".