20311332131 has 16 divisors (see below), whose sum is σ = 22450742784. Its totient is φ = 18277590144.

The previous prime is 20311332121. The next prime is 20311332143. The reversal of 20311332131 is 13123311302.

It is a cyclic number.

It is not a de Polignac number, because 20311332131 - 2²² = 20307137827 is a prime.

It is a super-3 number, since 3×20311332131³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20311332121) 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 15 ways as a sum of consecutive naturals, for example, 1031480 + ... + 1050986.

It is an arithmetic number, because the mean of its divisors is an integer number (1403171424).

Almost surely, 2^20311332131 is an apocalyptic number.

20311332131 is a deficient number, since it is larger than the sum of its proper divisors (2139410653).

20311332131 is a wasteful number, since it uses less digits than its factorization.

20311332131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22210.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 20311332131 its reverse (13123311302), we get a palindrome (33434643433).

The spelling of 20311332131 in words is "twenty billion, three hundred eleven million, three hundred thirty-two thousand, one hundred thirty-one".