20549673 has 16 divisors (see below), whose sum is σ = 30589440. Its totient is φ = 13634352.

The previous prime is 20549663. The next prime is 20549677. The reversal of 20549673 is 37694502.

It is not a de Polignac number, because 20549673 - 2⁶ = 20549609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20549677) 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, 4315 + ... + 7727.

It is an arithmetic number, because the mean of its divisors is an integer number (1911840).

Almost surely, 2^20549673 is an apocalyptic number.

It is an amenable number.

20549673 is a deficient number, since it is larger than the sum of its proper divisors (10039767).

20549673 is a wasteful number, since it uses less digits than its factorization.

20549673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645 (or 3639 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The square root of 20549673 is about 4533.1747153623. The cubic root of 20549673 is about 273.9060585126.

The spelling of 20549673 in words is "twenty million, five hundred forty-nine thousand, six hundred seventy-three".