20321066336431 has 24 divisors (see below), whose sum is σ = 23675698799424. Its totient is φ = 17390881892160.

The previous prime is 20321066336399. The next prime is 20321066336609. The reversal of 20321066336431 is 13463366012302.

It is not a de Polignac number, because 20321066336431 - 2⁵ = 20321066336399 is a prime.

It is a super-2 number, since 2×20321066336431² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321066366431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86583066 + ... + 86817448.

It is an arithmetic number, because the mean of its divisors is an integer number (986487449976).

Almost surely, 2^{20321066336431} is an apocalyptic number.

20321066336431 is a deficient number, since it is larger than the sum of its proper divisors (3354632462993).

20321066336431 is a wasteful number, since it uses less digits than its factorization.

20321066336431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237151 (or 237144 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 40.

The spelling of 20321066336431 in words is "twenty trillion, three hundred twenty-one billion, sixty-six million, three hundred thirty-six thousand, four hundred thirty-one".