20406032 has 20 divisors (see below), whose sum is σ = 39635856. Its totient is φ = 10177440.

The previous prime is 20406017. The next prime is 20406107. The reversal of 20406032 is 23060402.

It is a super-2 number, since 2×20406032² = 832812283970048, 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 20406032.

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 3 ways as a sum of consecutive naturals, for example, 6107 + ... + 8837.

Almost surely, 2^20406032 is an apocalyptic number.

It is an amenable number.

20406032 is a deficient number, since it is larger than the sum of its proper divisors (19229824).

20406032 is a wasteful number, since it uses less digits than its factorization.

20406032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3206 (or 3200 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 20406032 is about 4517.3036205241. The cubic root of 20406032 is about 273.2663700063.

Adding to 20406032 its reverse (23060402), we get a palindrome (43466434).

The spelling of 20406032 in words is "twenty million, four hundred six thousand, thirty-two".