20684153 has 8 divisors (see below), whose sum is σ = 24667008. Its totient is φ = 16958304.

The previous prime is 20684149. The next prime is 20684159. The reversal of 20684153 is 35148602.

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

It is a cyclic number.

It is not a de Polignac number, because 20684153 - 2² = 20684149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20684159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64076 + ... + 64397.

It is an arithmetic number, because the mean of its divisors is an integer number (3083376).

Almost surely, 2^20684153 is an apocalyptic number.

20684153 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20684153 is a deficient number, since it is larger than the sum of its proper divisors (3982855).

20684153 is a wasteful number, since it uses less digits than its factorization.

20684153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128503.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 20684153 is about 4547.9833992661. The cubic root of 20684153 is about 274.5022533472.

The spelling of 20684153 in words is "twenty million, six hundred eighty-four thousand, one hundred fifty-three".