20621032 has 16 divisors (see below), whose sum is σ = 39608100. Its totient is φ = 10058880.

The previous prime is 20621009. The next prime is 20621063. The reversal of 20621032 is 23012602.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 4186116 = 4054^2 + 2046^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20620997 and 20621015.

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, 31107 + ... + 31762.

Almost surely, 2^20621032 is an apocalyptic number.

It is an amenable number.

20621032 is a deficient number, since it is larger than the sum of its proper divisors (18987068).

20621032 is a wasteful number, since it uses less digits than its factorization.

20621032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62916 (or 62912 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 20621032 is about 4541.0386477105. The cubic root of 20621032 is about 274.2227396554. Note that the first 3 decimals are identical.

Adding to 20621032 its reverse (23012602), we get a palindrome (43633634).

The spelling of 20621032 in words is "twenty million, six hundred twenty-one thousand, thirty-two".