20632791 has 16 divisors (see below), whose sum is σ = 28464128. Its totient is φ = 13284000.

The previous prime is 20632753. The next prime is 20632811. The reversal of 20632791 is 19723602.

It is not a de Polignac number, because 20632791 - 2⁷ = 20632663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20632751) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16146 + ... + 17376.

It is an arithmetic number, because the mean of its divisors is an integer number (1779008).

Almost surely, 2^20632791 is an apocalyptic number.

20632791 is a deficient number, since it is larger than the sum of its proper divisors (7831337).

20632791 is a wasteful number, since it uses less digits than its factorization.

20632791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1422.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 20632791 is about 4542.3332110271. Note that the first 3 decimals coincide. The cubic root of 20632791 is about 274.2748542870.

The spelling of 20632791 in words is "twenty million, six hundred thirty-two thousand, seven hundred ninety-one".