20680626 has 16 divisors (see below), whose sum is σ = 43538400. Its totient is φ = 6530688.

The previous prime is 20680613. The next prime is 20680631. The reversal of 20680626 is 62608602.

It is a junction number, because it is equal to n+sod(n) for n = 20680593 and 20680602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90591 + ... + 90818.

It is an arithmetic number, because the mean of its divisors is an integer number (2721150).

Almost surely, 2^20680626 is an apocalyptic number.

20680626 is an abundant number, since it is smaller than the sum of its proper divisors (22857774).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20680626 is a wasteful number, since it uses less digits than its factorization.

20680626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181433.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20680626 is about 4547.5956284613. The cubic root of 20680626 is about 274.4866500254.

The spelling of 20680626 in words is "twenty million, six hundred eighty thousand, six hundred twenty-six".