20469937 has 2 divisors, whose sum is σ = 20469938. Its totient is φ = 20469936.

The previous prime is 20469923. The next prime is 20469941. The reversal of 20469937 is 73996402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19749136 + 720801 = 4444^2 + 849^2 .

It is a cyclic number.

It is not a de Polignac number, because 20469937 - 2⁷ = 20469809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20469937.

It is not a weakly prime, because it can be changed into another prime (20464937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10234968 + 10234969.

It is an arithmetic number, because the mean of its divisors is an integer number (10234969).

Almost surely, 2^20469937 is an apocalyptic number.

It is an amenable number.

20469937 is a deficient number, since it is larger than the sum of its proper divisors (1).

20469937 is an equidigital number, since it uses as much as digits as its factorization.

20469937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 20469937 is about 4524.3714480577. The cubic root of 20469937 is about 273.5513329603.

The spelling of 20469937 in words is "twenty million, four hundred sixty-nine thousand, nine hundred thirty-seven".