20506632 has 16 divisors (see below), whose sum is σ = 51266640. Its totient is φ = 6835536.

The previous prime is 20506631. The next prime is 20506637. The reversal of 20506632 is 23660502.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 854443 = 20506632 / (2 + 0 + 5 + 0 + 6 + 6 + 3 + 2).

It is not an unprimeable number, because it can be changed into a prime (20506631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 427198 + ... + 427245.

It is an arithmetic number, because the mean of its divisors is an integer number (3204165).

Almost surely, 2^20506632 is an apocalyptic number.

It is an amenable number.

20506632 is an abundant number, since it is smaller than the sum of its proper divisors (30760008).

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

20506632 is a wasteful number, since it uses less digits than its factorization.

20506632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854452 (or 854448 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 20506632 is about 4528.4248917256. The cubic root of 20506632 is about 273.7146940560.

The spelling of 20506632 in words is "twenty million, five hundred six thousand, six hundred thirty-two".