20109734 has 4 divisors (see below), whose sum is σ = 30164604. Its totient is φ = 10054866.

The previous prime is 20109709. The next prime is 20109743. The reversal of 20109734 is 43790102.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5027432 + ... + 5027435.

It is an arithmetic number, because the mean of its divisors is an integer number (7541151).

Almost surely, 2^20109734 is an apocalyptic number.

20109734 is a deficient number, since it is larger than the sum of its proper divisors (10054870).

20109734 is a wasteful number, since it uses less digits than its factorization.

20109734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054869.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 20109734 is about 4484.3878066019. The cubic root of 20109734 is about 271.9372963160.

Adding to 20109734 its reverse (43790102), we get a palindrome (63899836).

The spelling of 20109734 in words is "twenty million, one hundred nine thousand, seven hundred thirty-four".