20401203131 has 8 divisors (see below), whose sum is σ = 20595934464. Its totient is φ = 20207336040.

The previous prime is 20401203071. The next prime is 20401203139. The reversal of 20401203131 is 13130210402.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20401203131 is a prime.

It is a super-2 number, since 2×20401203131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20401203139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168575 + ... + 263096.

It is an arithmetic number, because the mean of its divisors is an integer number (2574491808).

Almost surely, 2^20401203131 is an apocalyptic number.

20401203131 is a deficient number, since it is larger than the sum of its proper divisors (194731333).

20401203131 is a wasteful number, since it uses less digits than its factorization.

20401203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432121.

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

Adding to 20401203131 its reverse (13130210402), we get a palindrome (33531413533).

The spelling of 20401203131 in words is "twenty billion, four hundred one million, two hundred three thousand, one hundred thirty-one".