20674149 has 4 divisors (see below), whose sum is σ = 27565536. Its totient is φ = 13782764.

The previous prime is 20674133. The next prime is 20674153. The reversal of 20674149 is 94147602.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20674149 - 2⁴ = 20674133 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20674189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3445689 + ... + 3445694.

It is an arithmetic number, because the mean of its divisors is an integer number (6891384).

Almost surely, 2^20674149 is an apocalyptic number.

It is an amenable number.

20674149 is a deficient number, since it is larger than the sum of its proper divisors (6891387).

20674149 is an equidigital number, since it uses as much as digits as its factorization.

20674149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6891386.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 20674149 is about 4546.8834381365. The cubic root of 20674149 is about 274.4579913883.

It can be divided in two parts, 2067 and 4149, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 20674149 in words is "twenty million, six hundred seventy-four thousand, one hundred forty-nine".