20001232131 has 8 divisors (see below), whose sum is σ = 26838171984. Its totient is φ = 13249223520.

The previous prime is 20001232129. The next prime is 20001232211. The reversal of 20001232131 is 13123210002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20001232131 - 2¹ = 20001232129 is a prime.

It is a super-2 number, since 2×20001232131² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20001232131.

It is not an unprimeable number, because it can be changed into a prime (20001232631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21232260 + ... + 21233201.

It is an arithmetic number, because the mean of its divisors is an integer number (3354771498).

Almost surely, 2^20001232131 is an apocalyptic number.

20001232131 is a deficient number, since it is larger than the sum of its proper divisors (6836939853).

20001232131 is a wasteful number, since it uses less digits than its factorization.

20001232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42465621.

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

Adding to 20001232131 its reverse (13123210002), we get a palindrome (33124442133).

The spelling of 20001232131 in words is "twenty billion, one million, two hundred thirty-two thousand, one hundred thirty-one".