20328633 has 24 divisors (see below), whose sum is σ = 31783752. Its totient is φ = 12446208.

The previous prime is 20328631. The next prime is 20328641. The reversal of 20328633 is 33682302.

20328633 is a `hidden beast` number, since 2 + 0 + 3 + 28 + 633 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5212089 + 15116544 = 2283^2 + 3888^2 .

It is not a de Polignac number, because 20328633 - 2¹ = 20328631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20328597 and 20328606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20328631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33985 + ... + 34577.

It is an arithmetic number, because the mean of its divisors is an integer number (1324323).

Almost surely, 2^20328633 is an apocalyptic number.

It is an amenable number.

20328633 is a deficient number, since it is larger than the sum of its proper divisors (11455119).

20328633 is a wasteful number, since it uses less digits than its factorization.

20328633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20328633 is about 4508.7285347424. The cubic root of 20328633 is about 272.9204373065.

The spelling of 20328633 in words is "twenty million, three hundred twenty-eight thousand, six hundred thirty-three".