20432851 has 2 divisors, whose sum is σ = 20432852. Its totient is φ = 20432850.

The previous prime is 20432803. The next prime is 20432873. The reversal of 20432851 is 15823402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20432851 - 2¹⁷ = 20301779 is a prime.

It is not a weakly prime, because it can be changed into another prime (20432051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216425 + 10216426.

It is an arithmetic number, because the mean of its divisors is an integer number (10216426).

Almost surely, 2^20432851 is an apocalyptic number.

20432851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20432851 is an equidigital number, since it uses as much as digits as its factorization.

20432851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20432851 is about 4520.2711201874. The cubic root of 20432851 is about 273.3860327035.

The spelling of 20432851 in words is "twenty million, four hundred thirty-two thousand, eight hundred fifty-one".