20877834 has 16 divisors (see below), whose sum is σ = 42344640. Its totient is φ = 6861120.

The previous prime is 20877821. The next prime is 20877851. The reversal of 20877834 is 43877802.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20877792 and 20877801.

It is an unprimeable number.

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, 24079 + ... + 24930.

It is an arithmetic number, because the mean of its divisors is an integer number (2646540).

Almost surely, 2^20877834 is an apocalyptic number.

20877834 is an abundant number, since it is smaller than the sum of its proper divisors (21466806).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20877834 is a wasteful number, since it uses less digits than its factorization.

20877834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49085.

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 20877834 is about 4569.2268492602. The cubic root of 20877834 is about 275.3563820298.

The spelling of 20877834 in words is "twenty million, eight hundred seventy-seven thousand, eight hundred thirty-four".