20886630 has 32 divisors (see below), whose sum is σ = 51353568. Its totient is φ = 5433600.

The previous prime is 20886629. The next prime is 20886637. The reversal of 20886630 is 3668802.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20886591 and 20886600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20886637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7261 + ... + 9720.

It is an arithmetic number, because the mean of its divisors is an integer number (1604799).

Almost surely, 2^20886630 is an apocalyptic number.

20886630 is an abundant number, since it is smaller than the sum of its proper divisors (30466938).

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

20886630 is a wasteful number, since it uses less digits than its factorization.

20886630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17032.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 20886630 is about 4570.1892739798. The cubic root of 20886630 is about 275.3950465559.

The spelling of 20886630 in words is "twenty million, eight hundred eighty-six thousand, six hundred thirty".