20003565471123 has 16 divisors (see below), whose sum is σ = 28906017857696. Its totient is φ = 12231479520000.

The previous prime is 20003565471101. The next prime is 20003565471173. The reversal of 20003565471123 is 32117456530002.

It is not a de Polignac number, because 20003565471123 - 2¹⁰ = 20003565470099 is a prime.

It is a super-2 number, since 2×20003565471123² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20003565471173) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1633471378 + ... + 1633483623.

It is an arithmetic number, because the mean of its divisors is an integer number (1806626116106).

Almost surely, 2^{20003565471123} is an apocalyptic number.

20003565471123 is a deficient number, since it is larger than the sum of its proper divisors (8902452386573).

20003565471123 is a wasteful number, since it uses less digits than its factorization.

20003565471123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266955174.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20003565471123 in words is "twenty trillion, three billion, five hundred sixty-five million, four hundred seventy-one thousand, one hundred twenty-three".