20626556 has 12 divisors (see below), whose sum is σ = 36212568. Its totient is φ = 10280112.

The previous prime is 20626547. The next prime is 20626589. The reversal of 20626556 is 65562602.

It is a super-2 number, since 2×20626556² = 850909624842272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6866 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (3017714).

Almost surely, 2^20626556 is an apocalyptic number.

It is an amenable number.

20626556 is a deficient number, since it is larger than the sum of its proper divisors (15586012).

20626556 is a wasteful number, since it uses less digits than its factorization.

20626556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16588 (or 16586 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 20626556 is about 4541.6468378772. The cubic root of 20626556 is about 274.2472238999.

It can be divided in two parts, 206 and 26556, that added together give a palindrome (26762).

The spelling of 20626556 in words is "twenty million, six hundred twenty-six thousand, five hundred fifty-six".