20507834 has 16 divisors (see below), whose sum is σ = 31578336. Its totient is φ = 9985200.

The previous prime is 20507807. The next prime is 20507849. The reversal of 20507834 is 43870502.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20507797 and 20507806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12269 + ... + 13839.

It is an arithmetic number, because the mean of its divisors is an integer number (1973646).

Almost surely, 2^20507834 is an apocalyptic number.

20507834 is a deficient number, since it is larger than the sum of its proper divisors (11070502).

20507834 is a wasteful number, since it uses less digits than its factorization.

20507834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741.

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

The square root of 20507834 is about 4528.5576070091. The cubic root of 20507834 is about 273.7200418972.

The spelling of 20507834 in words is "twenty million, five hundred seven thousand, eight hundred thirty-four".