20831034 has 32 divisors (see below), whose sum is σ = 48779136. Its totient is φ = 5806080.

The previous prime is 20831017. The next prime is 20831051. The reversal of 20831034 is 43013802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20831017) and next prime (20831051).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20831034.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4327 + ... + 7770.

It is an arithmetic number, because the mean of its divisors is an integer number (1524348).

Almost surely, 2^20831034 is an apocalyptic number.

20831034 is an abundant number, since it is smaller than the sum of its proper divisors (27948102).

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

20831034 is a wasteful number, since it uses less digits than its factorization.

20831034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12150.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20831034 is about 4564.1027595794. The cubic root of 20831034 is about 275.1504807269.

Adding to 20831034 its reverse (43013802), we get a palindrome (63844836).

The spelling of 20831034 in words is "twenty million, eight hundred thirty-one thousand, thirty-four".