20169826 has 4 divisors (see below), whose sum is σ = 30254742. Its totient is φ = 10084912.

The previous prime is 20169817. The next prime is 20169829. The reversal of 20169826 is 62896102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19368801 + 801025 = 4401^2 + 895^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20169791 and 20169800.

It is not an unprimeable number, because it can be changed into a prime (20169829) 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, 5042455 + ... + 5042458.

Almost surely, 2^20169826 is an apocalyptic number.

20169826 is a deficient number, since it is larger than the sum of its proper divisors (10084916).

20169826 is a wasteful number, since it uses less digits than its factorization.

20169826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10084915.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 20169826 is about 4491.0829428992. The cubic root of 20169826 is about 272.2078950548.

The spelling of 20169826 in words is "twenty million, one hundred sixty-nine thousand, eight hundred twenty-six".