20834279 has 4 divisors (see below), whose sum is σ = 21930840. Its totient is φ = 19737720.

The previous prime is 20834249. The next prime is 20834321. The reversal of 20834279 is 97243802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97243802 = 2 ⋅48621901.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20834279 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 (20834249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 548252 + ... + 548289.

It is an arithmetic number, because the mean of its divisors is an integer number (5482710).

Almost surely, 2^20834279 is an apocalyptic number.

20834279 is a deficient number, since it is larger than the sum of its proper divisors (1096561).

20834279 is a wasteful number, since it uses less digits than its factorization.

20834279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096560.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20834279 is about 4564.4582372939. The cubic root of 20834279 is about 275.1647673749.

The spelling of 20834279 in words is "twenty million, eight hundred thirty-four thousand, two hundred seventy-nine".