20678627 has 4 divisors (see below), whose sum is σ = 20810496. Its totient is φ = 20546760.

The previous prime is 20678591. The next prime is 20678629. The reversal of 20678627 is 72687602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20678627 - 2¹² = 20674531 is a prime.

It is a super-2 number, since 2×20678627² = 855211229210258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20678629) 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, 65699 + ... + 66012.

It is an arithmetic number, because the mean of its divisors is an integer number (5202624).

Almost surely, 2^20678627 is an apocalyptic number.

20678627 is a deficient number, since it is larger than the sum of its proper divisors (131869).

20678627 is a wasteful number, since it uses less digits than its factorization.

20678627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131868.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 20678627 is about 4547.3758366777. The cubic root of 20678627 is about 274.4778057333.

The spelling of 20678627 in words is "twenty million, six hundred seventy-eight thousand, six hundred twenty-seven".