20539206 has 12 divisors (see below), whose sum is σ = 44501652. Its totient is φ = 6846396.

The previous prime is 20539199. The next prime is 20539217. The reversal of 20539206 is 60293502.

It is a super-2 number, since 2×20539206² = 843717966220872, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20539206.

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 5 ways as a sum of consecutive naturals, for example, 570516 + ... + 570551.

It is an arithmetic number, because the mean of its divisors is an integer number (3708471).

Almost surely, 2^20539206 is an apocalyptic number.

20539206 is an abundant number, since it is smaller than the sum of its proper divisors (23962446).

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

20539206 is a wasteful number, since it uses less digits than its factorization.

20539206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141075 (or 1141072 counting only the distinct ones).

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

The square root of 20539206 is about 4532.0200793906. The cubic root of 20539206 is about 273.8595458241.

The spelling of 20539206 in words is "twenty million, five hundred thirty-nine thousand, two hundred six".