20344512126403 has 4 divisors (see below), whose sum is σ = 20344524452568. Its totient is φ = 20344499800240.

The previous prime is 20344512126397. The next prime is 20344512126409. The reversal of 20344512126403 is 30462121544302.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20344512126397) and next prime (20344512126409).

It is a cyclic number.

It is not a de Polignac number, because 20344512126403 - 2²¹ = 20344510029251 is a prime.

It is a super-2 number, since 2×20344512126403² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20344512126409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3218293 + ... + 7144678.

It is an arithmetic number, because the mean of its divisors is an integer number (5086131113142).

Almost surely, 2^{20344512126403} is an apocalyptic number.

20344512126403 is a deficient number, since it is larger than the sum of its proper divisors (12326165).

20344512126403 is a wasteful number, since it uses less digits than its factorization.

20344512126403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12326164.

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 20344512126403 in words is "twenty trillion, three hundred forty-four billion, five hundred twelve million, one hundred twenty-six thousand, four hundred three".