20632845 has 16 divisors (see below), whose sum is σ = 33207552. Its totient is φ = 10939200.

The previous prime is 20632811. The next prime is 20632853. The reversal of 20632845 is 54823602.

It is not a de Polignac number, because 20632845 - 2⁸ = 20632589 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 1381 + ... + 6570.

It is an arithmetic number, because the mean of its divisors is an integer number (2075472).

Almost surely, 2^20632845 is an apocalyptic number.

It is an amenable number.

20632845 is a deficient number, since it is larger than the sum of its proper divisors (12574707).

20632845 is a wasteful number, since it uses less digits than its factorization.

20632845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8132.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20632845 is about 4542.3391551050. The cubic root of 20632845 is about 274.2750935635.

The spelling of 20632845 in words is "twenty million, six hundred thirty-two thousand, eight hundred forty-five".