20945726 has 4 divisors (see below), whose sum is σ = 31418592. Its totient is φ = 10472862.

The previous prime is 20945723. The next prime is 20945731. The reversal of 20945726 is 62754902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20945723) 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 as a sum of consecutive naturals, namely, 5236430 + ... + 5236433.

It is an arithmetic number, because the mean of its divisors is an integer number (7854648).

Almost surely, 2^20945726 is an apocalyptic number.

20945726 is a deficient number, since it is larger than the sum of its proper divisors (10472866).

20945726 is a wasteful number, since it uses less digits than its factorization.

20945726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10472865.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20945726 is about 4576.6500849420. The cubic root of 20945726 is about 275.6545334568.

The spelling of 20945726 in words is "twenty million, nine hundred forty-five thousand, seven hundred twenty-six".