20646102 has 8 divisors (see below), whose sum is σ = 41292216. Its totient is φ = 6882032.

The previous prime is 20646091. The next prime is 20646107. The reversal of 20646102 is 20164602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

20646102 is an admirable number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 1720503 + ... + 1720514.

It is an arithmetic number, because the mean of its divisors is an integer number (5161527).

Almost surely, 2^20646102 is an apocalyptic number.

20646102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20646102 is a wasteful number, since it uses less digits than its factorization.

20646102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441022.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 20646102 is about 4543.7981909411. The cubic root of 20646102 is about 274.3338233290. Note that the first 3 decimals are identical.

The spelling of 20646102 in words is "twenty million, six hundred forty-six thousand, one hundred two".