20318426 has 4 divisors (see below), whose sum is σ = 30477642. Its totient is φ = 10159212.

The previous prime is 20318413. The next prime is 20318437. The reversal of 20318426 is 62481302.

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., 18361225 + 1957201 = 4285^2 + 1399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20318395 and 20318404.

It is an unprimeable number.

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, 5079605 + ... + 5079608.

Almost surely, 2^20318426 is an apocalyptic number.

20318426 is a deficient number, since it is larger than the sum of its proper divisors (10159216).

20318426 is a wasteful number, since it uses less digits than its factorization.

20318426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10159215.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 20318426 is about 4507.5964770596. The cubic root of 20318426 is about 272.8747519053.

Adding to 20318426 its reverse (62481302), we get a palindrome (82799728).

The spelling of 20318426 in words is "twenty million, three hundred eighteen thousand, four hundred twenty-six".