20930626 has 8 divisors (see below), whose sum is σ = 31607100. Its totient is φ = 10394928.

The previous prime is 20930617. The next prime is 20930627. The reversal of 20930626 is 62603902.

It is a Cunningham number, because it is equal to 4575²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 20930625 + 1 = 4575^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20930626² = 876182209503752, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20930594 and 20930603.

It is not an unprimeable number, because it can be changed into a prime (20930627) 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 in 3 ways as a sum of consecutive naturals, for example, 34821 + ... + 35416.

Almost surely, 2^20930626 is an apocalyptic number.

20930626 is a deficient number, since it is larger than the sum of its proper divisors (10676474).

20930626 is a wasteful number, since it uses less digits than its factorization.

20930626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70388.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 20930626 is about 4575.0001092896. Note that the first 3 decimals coincide. The cubic root of 20930626 is about 275.5882767561.

The spelling of 20930626 in words is "twenty million, nine hundred thirty thousand, six hundred twenty-six".