20674407 has 16 divisors (see below), whose sum is σ = 30320640. Its totient is φ = 12450912.

The previous prime is 20674393. The next prime is 20674417. The reversal of 20674407 is 70447602.

It is not a de Polignac number, because 20674407 - 2¹² = 20670311 is a prime.

It is a super-2 number, since 2×20674407² = 854862209603298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674417) 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 15 ways as a sum of consecutive naturals, for example, 3807 + ... + 7472.

It is an arithmetic number, because the mean of its divisors is an integer number (1895040).

Almost surely, 2^20674407 is an apocalyptic number.

20674407 is a deficient number, since it is larger than the sum of its proper divisors (9646233).

20674407 is a wasteful number, since it uses less digits than its factorization.

20674407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11342.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 20674407 is about 4546.9118091294. The cubic root of 20674407 is about 274.4591330696.

The spelling of 20674407 in words is "twenty million, six hundred seventy-four thousand, four hundred seven".