20342634 has 64 divisors (see below), whose sum is σ = 46448640. Its totient is φ = 5895360.

The previous prime is 20342633. The next prime is 20342687. The reversal of 20342634 is 43624302.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20342633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113557 + ... + 113735.

It is an arithmetic number, because the mean of its divisors is an integer number (725760).

Almost surely, 2^20342634 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20342634, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23224320).

20342634 is an abundant number, since it is smaller than the sum of its proper divisors (26106006).

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

20342634 is a wasteful number, since it uses less digits than its factorization.

20342634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275.

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 20342634 is about 4510.2809225147. The cubic root of 20342634 is about 272.9830793629.

Adding to 20342634 its reverse (43624302), we get a palindrome (63966936).

The spelling of 20342634 in words is "twenty million, three hundred forty-two thousand, six hundred thirty-four".