20674563 has 16 divisors (see below), whose sum is σ = 33927936. Its totient is φ = 10905120.

The previous prime is 20674543. The next prime is 20674571. The reversal of 20674563 is 36547602.

It is not a de Polignac number, because 20674563 - 2⁵ = 20674531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20674513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37593 + ... + 38138.

It is an arithmetic number, because the mean of its divisors is an integer number (2120496).

Almost surely, 2^20674563 is an apocalyptic number.

20674563 is a deficient number, since it is larger than the sum of its proper divisors (13253373).

20674563 is a wasteful number, since it uses less digits than its factorization.

20674563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75754.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20674563 is about 4546.9289635973. The cubic root of 20674563 is about 274.4598233839.

The spelling of 20674563 in words is "twenty million, six hundred seventy-four thousand, five hundred sixty-three".