20934045 has 80 divisors (see below), whose sum is σ = 42375168. Its totient is φ = 9797760.

The previous prime is 20934037. The next prime is 20934049. The reversal of 20934045 is 54043902.

It is not a de Polignac number, because 20934045 - 2³ = 20934037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 164772 + ... + 164898.

Almost surely, 2^20934045 is an apocalyptic number.

It is an amenable number.

20934045 is an abundant number, since it is smaller than the sum of its proper divisors (21441123).

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

20934045 is a wasteful number, since it uses less digits than its factorization.

20934045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 20934045 is about 4575.3737552248. The cubic root of 20934045 is about 275.6032816429.

Adding to 20934045 its reverse (54043902), we get a palindrome (74977947).

The spelling of 20934045 in words is "twenty million, nine hundred thirty-four thousand, forty-five".