20834507 has 4 divisors (see below), whose sum is σ = 21931080. Its totient is φ = 19737936.

The previous prime is 20834491. The next prime is 20834509. The reversal of 20834507 is 70543802.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20834507 - 2⁴ = 20834491 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20834507.

It is not an unprimeable number, because it can be changed into a prime (20834509) 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, 548258 + ... + 548295.

It is an arithmetic number, because the mean of its divisors is an integer number (5482770).

Almost surely, 2^20834507 is an apocalyptic number.

20834507 is a deficient number, since it is larger than the sum of its proper divisors (1096573).

20834507 is a wasteful number, since it uses less digits than its factorization.

20834507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1096572.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 20834507 is about 4564.4832128073. The cubic root of 20834507 is about 275.1657711268.

The spelling of 20834507 in words is "twenty million, eight hundred thirty-four thousand, five hundred seven".