20877393 has 8 divisors (see below), whose sum is σ = 27866368. Its totient is φ = 13903344.

The previous prime is 20877391. The next prime is 20877431. The reversal of 20877393 is 39377802.

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

It is not a de Polignac number, because 20877393 - 2¹ = 20877391 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20877391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96 + ... + 6462.

It is an arithmetic number, because the mean of its divisors is an integer number (3483296).

Almost surely, 2^20877393 is an apocalyptic number.

It is an amenable number.

20877393 is a deficient number, since it is larger than the sum of its proper divisors (6988975).

20877393 is a wasteful number, since it uses less digits than its factorization.

20877393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7463.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 20877393 is about 4569.1785913882. The cubic root of 20877393 is about 275.3544432428.

The spelling of 20877393 in words is "twenty million, eight hundred seventy-seven thousand, three hundred ninety-three".