20522747 has 8 divisors (see below), whose sum is σ = 23483616. Its totient is φ = 17569152.

The previous prime is 20522743. The next prime is 20522767. The reversal of 20522747 is 74722502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20522747 - 2² = 20522743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20522741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7283 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (2935452).

Almost surely, 2^20522747 is an apocalyptic number.

20522747 is a deficient number, since it is larger than the sum of its proper divisors (2960869).

20522747 is a wasteful number, since it uses less digits than its factorization.

20522747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3637.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20522747 is about 4530.2038585476. The cubic root of 20522747 is about 273.7863742385.

The spelling of 20522747 in words is "twenty million, five hundred twenty-two thousand, seven hundred forty-seven".