20450404443623 has 48 divisors (see below), whose sum is σ = 26341680499200. Its totient is φ = 15696088087680.

The previous prime is 20450404443569. The next prime is 20450404443631. The reversal of 20450404443623 is 32634440405402.

It is a happy number.

It is not a de Polignac number, because 20450404443623 - 2¹⁸ = 20450404181479 is a prime.

It is a super-2 number, since 2×20450404443623² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20450404448623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 552113138 + ... + 552150176.

It is an arithmetic number, because the mean of its divisors is an integer number (548785010400).

Almost surely, 2^{20450404443623} is an apocalyptic number.

20450404443623 is a deficient number, since it is larger than the sum of its proper divisors (5891276055577).

20450404443623 is a wasteful number, since it uses less digits than its factorization.

20450404443623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52420 (or 52413 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 41.

The spelling of 20450404443623 in words is "twenty trillion, four hundred fifty billion, four hundred four million, four hundred forty-three thousand, six hundred twenty-three".