20001002231 has 24 divisors (see below), whose sum is σ = 24646202640. Its totient is φ = 16127983872.

The previous prime is 20001002227. The next prime is 20001002261. The reversal of 20001002231 is 13220010002.

It is a happy number.

It is not a de Polignac number, because 20001002231 - 2² = 20001002227 is a prime.

It is a super-2 number, since 2×20001002231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001002201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2585936 + ... + 2593658.

It is an arithmetic number, because the mean of its divisors is an integer number (1026925110).

Almost surely, 2^20001002231 is an apocalyptic number.

20001002231 is a deficient number, since it is larger than the sum of its proper divisors (4645200409).

20001002231 is a wasteful number, since it uses less digits than its factorization.

20001002231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10863 (or 10856 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20001002231 its reverse (13220010002), we get a palindrome (33221012233).

The spelling of 20001002231 in words is "twenty billion, one million, two thousand, two hundred thirty-one".