20003103312031 has 16 divisors (see below), whose sum is σ = 23492729804544. Its totient is φ = 16674909499584.

The previous prime is 20003103311987. The next prime is 20003103312037. The reversal of 20003103312031 is 13021330130002.

It is not a de Polignac number, because 20003103312031 - 2¹¹ = 20003103309983 is a prime.

It is a super-2 number, since 2×20003103312031² (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 (20003103312037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142538221 + ... + 142678486.

It is an arithmetic number, because the mean of its divisors is an integer number (1468295612784).

Almost surely, 2^{20003103312031} is an apocalyptic number.

20003103312031 is a deficient number, since it is larger than the sum of its proper divisors (3489626492513).

20003103312031 is a wasteful number, since it uses less digits than its factorization.

20003103312031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285216990.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 20003103312031 its reverse (13021330130002), we get a palindrome (33024433442033).

The spelling of 20003103312031 in words is "twenty trillion, three billion, one hundred three million, three hundred twelve thousand, thirty-one".