20600506 has 4 divisors (see below), whose sum is σ = 30900762. Its totient is φ = 10300252.

The previous prime is 20600501. The next prime is 20600509. The reversal of 20600506 is 60500602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60500602 = 2 ⋅30250301.

It can be written as a sum of positive squares in only one way, i.e., 13359025 + 7241481 = 3655^2 + 2691^2 .

It is not an unprimeable number, because it can be changed into a prime (20600501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5150125 + ... + 5150128.

Almost surely, 2^20600506 is an apocalyptic number.

20600506 is a deficient number, since it is larger than the sum of its proper divisors (10300256).

20600506 is a wasteful number, since it uses less digits than its factorization.

20600506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10300255.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20600506 is about 4538.7780293819. The cubic root of 20600506 is about 274.1317231215.

The spelling of 20600506 in words is "twenty million, six hundred thousand, five hundred six".