20934071 has 4 divisors (see below), whose sum is σ = 21844272. Its totient is φ = 20023872.

The previous prime is 20934061. The next prime is 20934073. The reversal of 20934071 is 17043902.

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

It is a cyclic number.

It is not a de Polignac number, because 20934071 - 2⁶ = 20934007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20934071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455066 + ... + 455111.

It is an arithmetic number, because the mean of its divisors is an integer number (5461068).

Almost surely, 2^20934071 is an apocalyptic number.

20934071 is a deficient number, since it is larger than the sum of its proper divisors (910201).

20934071 is an equidigital number, since it uses as much as digits as its factorization.

20934071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910200.

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

The square root of 20934071 is about 4575.3765965219. The cubic root of 20934071 is about 275.6033957422.

Adding to 20934071 its reverse (17043902), we get a palindrome (37977973).

The spelling of 20934071 in words is "twenty million, nine hundred thirty-four thousand, seventy-one".