20443511420123 has 32 divisors (see below), whose sum is σ = 23173772474880. Its totient is φ = 17870546453760.

The previous prime is 20443511420093. The next prime is 20443511420131. The reversal of 20443511420123 is 32102411534402.

It is not a de Polignac number, because 20443511420123 - 2⁸ = 20443511419867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20443511420123.

It is not an unprimeable number, because it can be changed into a prime (20443511420723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72413786 + ... + 72695552.

It is an arithmetic number, because the mean of its divisors is an integer number (724180389840).

Almost surely, 2^{20443511420123} is an apocalyptic number.

20443511420123 is a deficient number, since it is larger than the sum of its proper divisors (2730261054757).

20443511420123 is a wasteful number, since it uses less digits than its factorization.

20443511420123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283907.

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 20443511420123 its reverse (32102411534402), we get a palindrome (52545922954525).

The spelling of 20443511420123 in words is "twenty trillion, four hundred forty-three billion, five hundred eleven million, four hundred twenty thousand, one hundred twenty-three".