20673783 has 12 divisors (see below), whose sum is σ = 32159400. Its totient is φ = 12722256.

The previous prime is 20673769. The next prime is 20673797. The reversal of 20673783 is 38737602.

It is an interprime number because it is at equal distance from previous prime (20673769) and next prime (20673797).

It is not a de Polignac number, because 20673783 - 2⁹ = 20673271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20673883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88233 + ... + 88466.

It is an arithmetic number, because the mean of its divisors is an integer number (2679950).

Almost surely, 2^20673783 is an apocalyptic number.

20673783 is a deficient number, since it is larger than the sum of its proper divisors (11485617).

20673783 is a wasteful number, since it uses less digits than its factorization.

20673783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176718 (or 176715 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 20673783 is about 4546.8431906104. The cubic root of 20673783 is about 274.4563717776.

The spelling of 20673783 in words is "twenty million, six hundred seventy-three thousand, seven hundred eighty-three".