20646106 has 32 divisors (see below), whose sum is σ = 34816320. Its totient is φ = 9120384.

The previous prime is 20646091. The next prime is 20646107. The reversal of 20646106 is 60164602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20646107) 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, 65806 + ... + 66118.

It is an arithmetic number, because the mean of its divisors is an integer number (1088010).

Almost surely, 2^20646106 is an apocalyptic number.

20646106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

20646106 is a deficient number, since it is larger than the sum of its proper divisors (14170214).

20646106 is a wasteful number, since it uses less digits than its factorization.

20646106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 20646106 is about 4543.7986311015. The cubic root of 20646106 is about 274.3338410456. Note that the first 3 decimals are identical.

The spelling of 20646106 in words is "twenty million, six hundred forty-six thousand, one hundred six".