20532906 has 32 divisors (see below), whose sum is σ = 48314880. Its totient is φ = 6441408.

The previous prime is 20532877. The next prime is 20532907. The reversal of 20532906 is 60923502.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20532906.

It is not an unprimeable number, because it can be changed into a prime (20532907) 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, 10266 + ... + 12101.

It is an arithmetic number, because the mean of its divisors is an integer number (1509840).

Almost surely, 2^20532906 is an apocalyptic number.

20532906 is an abundant number, since it is smaller than the sum of its proper divisors (27781974).

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

20532906 is a wasteful number, since it uses less digits than its factorization.

20532906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22395 (or 22389 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 20532906 is about 4531.3249717936. The cubic root of 20532906 is about 273.8315426064.

The spelling of 20532906 in words is "twenty million, five hundred thirty-two thousand, nine hundred six".