20662506 has 32 divisors (see below), whose sum is σ = 46137600. Its totient is φ = 6854400.

The previous prime is 20662501. The next prime is 20662517. The reversal of 20662506 is 60526602.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 20662506.

It is not an unprimeable number, because it can be changed into a prime (20662501) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12106 + ... + 13706.

It is an arithmetic number, because the mean of its divisors is an integer number (1441800).

Almost surely, 2^20662506 is an apocalyptic number.

20662506 is an abundant number, since it is smaller than the sum of its proper divisors (25475094).

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

20662506 is a wasteful number, since it uses less digits than its factorization.

20662506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1851 (or 1845 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20662506 is about 4545.6029303053. The cubic root of 20662506 is about 274.4064598122.

The spelling of 20662506 in words is "twenty million, six hundred sixty-two thousand, five hundred six".