20674305 has 32 divisors (see below), whose sum is σ = 37756800. Its totient is φ = 10725696.

The previous prime is 20674273. The next prime is 20674307. The reversal of 20674305 is 50347602.

It is a happy number.

It is not a de Polignac number, because 20674305 - 2⁵ = 20674273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20674307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2926 + ... + 7064.

It is an arithmetic number, because the mean of its divisors is an integer number (1179900).

Almost surely, 2^20674305 is an apocalyptic number.

It is an amenable number.

20674305 is a deficient number, since it is larger than the sum of its proper divisors (17082495).

20674305 is a wasteful number, since it uses less digits than its factorization.

20674305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20674305 is about 4546.9005927115. The cubic root of 20674305 is about 274.4586817084.

The spelling of 20674305 in words is "twenty million, six hundred seventy-four thousand, three hundred five".