20506910 has 16 divisors (see below), whose sum is σ = 37007712. Its totient is φ = 8181600.

The previous prime is 20506897. The next prime is 20506921. The reversal of 20506910 is 1960502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1775 + ... + 6645.

It is an arithmetic number, because the mean of its divisors is an integer number (2312982).

Almost surely, 2^20506910 is an apocalyptic number.

20506910 is a deficient number, since it is larger than the sum of its proper divisors (16500802).

20506910 is a wasteful number, since it uses less digits than its factorization.

20506910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5299.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 20506910 is about 4528.4555866211. The cubic root of 20506910 is about 273.7159309297.

The spelling of 20506910 in words is "twenty million, five hundred six thousand, nine hundred ten".