20456673 has 16 divisors (see below), whose sum is σ = 28876800. Its totient is φ = 12845520.

The previous prime is 20456669. The next prime is 20456699. The reversal of 20456673 is 37665402.

It is not a de Polignac number, because 20456673 - 2² = 20456669 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20456473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9948 + ... + 11826.

It is an arithmetic number, because the mean of its divisors is an integer number (1804800).

Almost surely, 2^20456673 is an apocalyptic number.

It is an amenable number.

20456673 is a deficient number, since it is larger than the sum of its proper divisors (8420127).

20456673 is a wasteful number, since it uses less digits than its factorization.

20456673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2092.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20456673 is about 4522.9053715505. The cubic root of 20456673 is about 273.4922354186.

The spelling of 20456673 in words is "twenty million, four hundred fifty-six thousand, six hundred seventy-three".