20339426 has 4 divisors (see below), whose sum is σ = 30509142. Its totient is φ = 10169712.

The previous prime is 20339401. The next prime is 20339447. The reversal of 20339426 is 62493302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62493302 = 2 ⋅31246651.

It can be written as a sum of positive squares in only one way, i.e., 15721225 + 4618201 = 3965^2 + 2149^2 .

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 as a sum of consecutive naturals, namely, 5084855 + ... + 5084858.

Almost surely, 2^20339426 is an apocalyptic number.

20339426 is a deficient number, since it is larger than the sum of its proper divisors (10169716).

20339426 is a wasteful number, since it uses less digits than its factorization.

20339426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10169715.

The product of its (nonzero) digits is 7776, while the sum is 29.

The square root of 20339426 is about 4509.9252765428. The cubic root of 20339426 is about 272.9687289473.

The spelling of 20339426 in words is "twenty million, three hundred thirty-nine thousand, four hundred twenty-six".