20948045 has 4 divisors (see below), whose sum is σ = 25137660. Its totient is φ = 16758432.

The previous prime is 20948017. The next prime is 20948069. The reversal of 20948045 is 54084902.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6832996 + 14115049 = 2614^2 + 3757^2 .

It is a cyclic number.

It is not a de Polignac number, because 20948045 - 2⁶ = 20947981 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2094800 + ... + 2094809.

It is an arithmetic number, because the mean of its divisors is an integer number (6284415).

Almost surely, 2^20948045 is an apocalyptic number.

It is an amenable number.

20948045 is a deficient number, since it is larger than the sum of its proper divisors (4189615).

20948045 is an equidigital number, since it uses as much as digits as its factorization.

20948045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189614.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 20948045 is about 4576.9034291757. The cubic root of 20948045 is about 275.6647060853.

The spelling of 20948045 in words is "twenty million, nine hundred forty-eight thousand, forty-five".