20879834 has 4 divisors (see below), whose sum is σ = 31319754. Its totient is φ = 10439916.

The previous prime is 20879821. The next prime is 20879863. The reversal of 20879834 is 43897802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19829209 + 1050625 = 4453^2 + 1025^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20879791 and 20879800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5219957 + ... + 5219960.

Almost surely, 2^20879834 is an apocalyptic number.

20879834 is a deficient number, since it is larger than the sum of its proper divisors (10439920).

20879834 is a wasteful number, since it uses less digits than its factorization.

20879834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439919.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 20879834 is about 4569.4456994257. The cubic root of 20879834 is about 275.3651743720.

The spelling of 20879834 in words is "twenty million, eight hundred seventy-nine thousand, eight hundred thirty-four".