20500034 has 4 divisors (see below), whose sum is σ = 30750054. Its totient is φ = 10250016.

The previous prime is 20500033. The next prime is 20500049. The reversal of 20500034 is 43000502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43000502 = 2 ⋅21500251.

It can be written as a sum of positive squares in only one way, i.e., 13344409 + 7155625 = 3653^2 + 2675^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20499991 and 20500018.

It is not an unprimeable number, because it can be changed into a prime (20500033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5125007 + ... + 5125010.

Almost surely, 2^20500034 is an apocalyptic number.

20500034 is a deficient number, since it is larger than the sum of its proper divisors (10250020).

20500034 is a wasteful number, since it uses less digits than its factorization.

20500034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10250019.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 20500034 is about 4527.6963237390. The cubic root of 20500034 is about 273.6853350455.

Adding to 20500034 its reverse (43000502), we get a palindrome (63500536).

The spelling of 20500034 in words is "twenty million, five hundred thousand, thirty-four".