20376891 has 6 divisors (see below), whose sum is σ = 29433300. Its totient is φ = 13584588.

The previous prime is 20376871. The next prime is 20376893. The reversal of 20376891 is 19867302.

It is not a de Polignac number, because 20376891 - 2¹⁰ = 20375867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20376893) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1132041 + ... + 1132058.

It is an arithmetic number, because the mean of its divisors is an integer number (4905550).

Almost surely, 2^20376891 is an apocalyptic number.

20376891 is a deficient number, since it is larger than the sum of its proper divisors (9056409).

20376891 is a wasteful number, since it uses less digits than its factorization.

20376891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2264105 (or 2264102 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20376891 is about 4514.0769820640. The cubic root of 20376891 is about 273.1362279490.

The spelling of 20376891 in words is "twenty million, three hundred seventy-six thousand, eight hundred ninety-one".