20664431141 has 16 divisors (see below), whose sum is σ = 23039976960. Its totient is φ = 18418521600.

The previous prime is 20664431129. The next prime is 20664431153. The reversal of 20664431141 is 14113446602.

It is an interprime number because it is at equal distance from previous prime (20664431129) and next prime (20664431153).

It is a cyclic number.

It is not a de Polignac number, because 20664431141 - 2¹⁸ = 20664168997 is a prime.

It is a super-2 number, since 2×20664431141² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20664431098 and 20664431107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20664431101) 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, 1012841 + ... + 1033041.

It is an arithmetic number, because the mean of its divisors is an integer number (1439998560).

Almost surely, 2^20664431141 is an apocalyptic number.

It is an amenable number.

20664431141 is a deficient number, since it is larger than the sum of its proper divisors (2375545819).

20664431141 is a wasteful number, since it uses less digits than its factorization.

20664431141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23404.

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 20664431141 its reverse (14113446602), we get a palindrome (34777877743).

The spelling of 20664431141 in words is "twenty billion, six hundred sixty-four million, four hundred thirty-one thousand, one hundred forty-one".