20131023102 has 32 divisors (see below), whose sum is σ = 43367823360. Its totient is φ = 6211534560.

The previous prime is 20131023091. The next prime is 20131023103. The reversal of 20131023102 is 20132013102.

It is a super-2 number, since 2×20131023102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131023103) 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, 2348577 + ... + 2357132.

It is an arithmetic number, because the mean of its divisors is an integer number (1355244480).

Almost surely, 2^20131023102 is an apocalyptic number.

20131023102 is an abundant number, since it is smaller than the sum of its proper divisors (23236800258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20131023102 is a wasteful number, since it uses less digits than its factorization.

20131023102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705768.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 20131023102 its reverse (20132013102), we get a palindrome (40263036204).

The spelling of 20131023102 in words is "twenty billion, one hundred thirty-one million, twenty-three thousand, one hundred two".