20432969 has 2 divisors, whose sum is σ = 20432970.
Its totient is φ = 20432968.
The previous prime is 20432957. The next prime is 20432977. The reversal of 20432969 is 96923402.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 11641744 + 8791225 = 3412^2 + 2965^2
It is a cyclic number.
It is not a de Polignac number, because 20432969 - 216 = 20367433 is a prime.
It is a super-2 number, since 2×204329692 = 835012444309922, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (20432669) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10216484 + 10216485.
It is an arithmetic number, because the mean of its divisors is an integer number (10216485).
Almost surely, 220432969 is an apocalyptic number.
It is an amenable number.
20432969 is a deficient number, since it is larger than the sum of its proper divisors (1).
20432969 is an equidigital number, since it uses as much as digits as its factorization.
20432969 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 23328, while the sum is 35.
The square root of 20432969 is about 4520.2841724830.
The cubic root of 20432969 is about 273.3865589718.
The spelling of 20432969 in words is "twenty million, four hundred thirty-two thousand, nine hundred sixty-nine".