20630896 has 80 divisors (see below), whose sum is σ = 47996928. Its totient is φ = 8467200.

The previous prime is 20630893. The next prime is 20630963. The reversal of 20630896 is 69803602.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20630893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162385 + ... + 162511.

Almost surely, 2^20630896 is an apocalyptic number.

20630896 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20630896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23998464).

20630896 is an abundant number, since it is smaller than the sum of its proper divisors (27366032).

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

20630896 is a wasteful number, since it uses less digits than its factorization.

20630896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 20630896 is about 4542.1246129978. The cubic root of 20630896 is about 274.2664571880.

The spelling of 20630896 in words is "twenty million, six hundred thirty thousand, eight hundred ninety-six".