20537673 has 16 divisors (see below), whose sum is σ = 29909376. Its totient is φ = 12458880.

The previous prime is 20537669. The next prime is 20537707. The reversal of 20537673 is 37673502.

It is not a de Polignac number, because 20537673 - 2² = 20537669 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20537633) 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 15 ways as a sum of consecutive naturals, for example, 940 + ... + 6477.

It is an arithmetic number, because the mean of its divisors is an integer number (1869336).

Almost surely, 2^20537673 is an apocalyptic number.

It is an amenable number.

20537673 is a deficient number, since it is larger than the sum of its proper divisors (9371703).

20537673 is a wasteful number, since it uses less digits than its factorization.

20537673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7504.

The product of its (nonzero) digits is 26460, while the sum is 33.

The square root of 20537673 is about 4531.8509463573. The cubic root of 20537673 is about 273.8527322350.

The spelling of 20537673 in words is "twenty million, five hundred thirty-seven thousand, six hundred seventy-three".