20239826 has 36 divisors (see below), whose sum is σ = 34388298. Its totient is φ = 8930304.

The previous prime is 20239819. The next prime is 20239831. The reversal of 20239826 is 62893202.

It can be written as a sum of positive squares in 3 ways, for example, as 19936225 + 303601 = 4465^2 + 551^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20239792 and 20239801.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 208610 + ... + 208706.

Almost surely, 2^20239826 is an apocalyptic number.

20239826 is a deficient number, since it is larger than the sum of its proper divisors (14148472).

20239826 is a wasteful number, since it uses less digits than its factorization.

20239826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 20239826 is about 4498.8694135305. The cubic root of 20239826 is about 272.5224334139.

The spelling of 20239826 in words is "twenty million, two hundred thirty-nine thousand, eight hundred twenty-six".