20132021231 has 16 divisors (see below), whose sum is σ = 24365208384. Its totient is φ = 16238444544.

The previous prime is 20132021227. The next prime is 20132021281. The reversal of 20132021231 is 13212023102.

It is not a de Polignac number, because 20132021231 - 2² = 20132021227 is a prime.

It is a super-2 number, since 2×20132021231² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132021281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1372271 + ... + 1386863.

It is an arithmetic number, because the mean of its divisors is an integer number (1522825524).

Almost surely, 2^20132021231 is an apocalyptic number.

20132021231 is a deficient number, since it is larger than the sum of its proper divisors (4233187153).

20132021231 is a wasteful number, since it uses less digits than its factorization.

20132021231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26210.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20132021231 its reverse (13212023102), we get a palindrome (33344044333).

The spelling of 20132021231 in words is "twenty billion, one hundred thirty-two million, twenty-one thousand, two hundred thirty-one".