20546723 has 4 divisors (see below), whose sum is σ = 20575488. Its totient is φ = 20517960.

The previous prime is 20546719. The next prime is 20546737. The reversal of 20546723 is 32764502.

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 20546723 - 2² = 20546719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20546753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13283 + ... + 14748.

It is an arithmetic number, because the mean of its divisors is an integer number (5143872).

Almost surely, 2^20546723 is an apocalyptic number.

20546723 is a deficient number, since it is larger than the sum of its proper divisors (28765).

20546723 is an equidigital number, since it uses as much as digits as its factorization.

20546723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28764.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20546723 is about 4532.8493246522. The cubic root of 20546723 is about 273.8929510609.

The spelling of 20546723 in words is "twenty million, five hundred forty-six thousand, seven hundred twenty-three".