20861032 has 16 divisors (see below), whose sum is σ = 39343140. Its totient is φ = 10369536.

The previous prime is 20861021. The next prime is 20861033. The reversal of 20861032 is 23016802.

It can be written as a sum of positive squares in 2 ways, for example, as 19766916 + 1094116 = 4446^2 + 1046^2 .

It is a super-2 number, since 2×20861032² = 870365312210048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20860994 and 20861012.

It is not an unprimeable number, because it can be changed into a prime (20861033) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6153 + ... + 8920.

Almost surely, 2^20861032 is an apocalyptic number.

It is an amenable number.

20861032 is a deficient number, since it is larger than the sum of its proper divisors (18482108).

20861032 is a wasteful number, since it uses less digits than its factorization.

20861032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15252 (or 15248 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 20861032 is about 4567.3878749237. The cubic root of 20861032 is about 275.2824953805.

Adding to 20861032 its reverse (23016802), we get a palindrome (43877834).

The spelling of 20861032 in words is "twenty million, eight hundred sixty-one thousand, thirty-two".