20887933 has 8 divisors (see below), whose sum is σ = 23777856. Its totient is φ = 18163200.

The previous prime is 20887931. The next prime is 20887939. The reversal of 20887933 is 33978802.

It is a happy number.

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

It is not a de Polignac number, because 20887933 - 2¹ = 20887931 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 (20887931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41028 + ... + 41533.

It is an arithmetic number, because the mean of its divisors is an integer number (2972232).

Almost surely, 2^20887933 is an apocalyptic number.

20887933 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20887933 is a deficient number, since it is larger than the sum of its proper divisors (2889923).

20887933 is a wasteful number, since it uses less digits than its factorization.

20887933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82595.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20887933 is about 4570.3318260275. The cubic root of 20887933 is about 275.4007732223.

The spelling of 20887933 in words is "twenty million, eight hundred eighty-seven thousand, nine hundred thirty-three".