20128853431 has 2 divisors, whose sum is σ = 20128853432. Its totient is φ = 20128853430.

The previous prime is 20128853389. The next prime is 20128853447. The reversal of 20128853431 is 13435882102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20128853431 - 2¹⁷ = 20128722359 is a prime.

It is a super-2 number, since 2×20128853431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20128853461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10064426715 + 10064426716.

It is an arithmetic number, because the mean of its divisors is an integer number (10064426716).

Almost surely, 2^20128853431 is an apocalyptic number.

20128853431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20128853431 is an equidigital number, since it uses as much as digits as its factorization.

20128853431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 20128853431 in words is "twenty billion, one hundred twenty-eight million, eight hundred fifty-three thousand, four hundred thirty-one".