20406594 has 32 divisors (see below), whose sum is σ = 44130240. Its totient is φ = 6253632.

The previous prime is 20406563. The next prime is 20406611. The reversal of 20406594 is 49560402.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30637 + ... + 31295.

It is an arithmetic number, because the mean of its divisors is an integer number (1379070).

Almost surely, 2^20406594 is an apocalyptic number.

20406594 is an abundant number, since it is smaller than the sum of its proper divisors (23723646).

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

20406594 is a wasteful number, since it uses less digits than its factorization.

20406594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20406594 is about 4517.3658253456. The cubic root of 20406594 is about 273.2688786484.

Adding to 20406594 its reverse (49560402), we get a palindrome (69966996).

The spelling of 20406594 in words is "twenty million, four hundred six thousand, five hundred ninety-four".