20432432551 has 2 divisors, whose sum is σ = 20432432552. Its totient is φ = 20432432550.

The previous prime is 20432432509. The next prime is 20432432557. The reversal of 20432432551 is 15523423402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20432432551 - 2¹⁵ = 20432399783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20432432557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216216275 + 10216216276.

It is an arithmetic number, because the mean of its divisors is an integer number (10216216276).

Almost surely, 2^20432432551 is an apocalyptic number.

20432432551 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432432551 is an equidigital number, since it uses as much as digits as its factorization.

20432432551 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 20432432551 its reverse (15523423402), we get a palindrome (35955855953).

The spelling of 20432432551 in words is "twenty billion, four hundred thirty-two million, four hundred thirty-two thousand, five hundred fifty-one".