20632993 has 8 divisors (see below), whose sum is σ = 21762720. Its totient is φ = 19507680.

The previous prime is 20632973. The next prime is 20632999. The reversal of 20632993 is 39923602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20632993 - 2⁵ = 20632961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20632999) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13746 + ... + 15172.

It is an arithmetic number, because the mean of its divisors is an integer number (2720340).

Almost surely, 2^20632993 is an apocalyptic number.

It is an amenable number.

20632993 is a deficient number, since it is larger than the sum of its proper divisors (1129727).

20632993 is a wasteful number, since it uses less digits than its factorization.

20632993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2207.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 20632993 is about 4542.3554462415. The cubic root of 20632993 is about 274.2757493564.

The spelling of 20632993 in words is "twenty million, six hundred thirty-two thousand, nine hundred ninety-three".