20431220201 has 8 divisors (see below), whose sum is σ = 24578911680. Its totient is φ = 16590765168.

The previous prime is 20431220197. The next prime is 20431220219. The reversal of 20431220201 is 10202213402.

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

It is a cyclic number.

It is not a de Polignac number, because 20431220201 - 2² = 20431220197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20431220201.

It is not an unprimeable number, because it can be changed into a prime (20431220231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76808966 + ... + 76809231.

It is an arithmetic number, because the mean of its divisors is an integer number (3072363960).

Almost surely, 2^20431220201 is an apocalyptic number.

It is an amenable number.

20431220201 is a deficient number, since it is larger than the sum of its proper divisors (4147691479).

20431220201 is a wasteful number, since it uses less digits than its factorization.

20431220201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153618223.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20431220201 its reverse (10202213402), we get a palindrome (30633433603).

The spelling of 20431220201 in words is "twenty billion, four hundred thirty-one million, two hundred twenty thousand, two hundred one".