20820632 has 16 divisors (see below), whose sum is σ = 44615760. Its totient is φ = 8923104.

The previous prime is 20820617. The next prime is 20820649. The reversal of 20820632 is 23602802.

It is a junction number, because it is equal to n+sod(n) for n = 20820598 and 20820607.

It is a congruent number.

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, 185843 + ... + 185954.

It is an arithmetic number, because the mean of its divisors is an integer number (2788485).

Almost surely, 2^20820632 is an apocalyptic number.

It is an amenable number.

20820632 is an abundant number, since it is smaller than the sum of its proper divisors (23795128).

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

20820632 is a wasteful number, since it uses less digits than its factorization.

20820632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371810 (or 371806 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 20820632 is about 4562.9630723906. The cubic root of 20820632 is about 275.1046742020.

The spelling of 20820632 in words is "twenty million, eight hundred twenty thousand, six hundred thirty-two".