20637696 has 48 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 6877184.

The previous prime is 20637691. The next prime is 20637697. The reversal of 20637696 is 69673602.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (20637691) 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, 4465 + ... + 7823.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^20637696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20637696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

20637696 is an abundant number, since it is smaller than the sum of its proper divisors (34399104).

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

20637696 is an equidigital number, since it uses as much as digits as its factorization.

20637696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384 (or 3364 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 39.

The square root of 20637696 is about 4542.8730997024. The cubic root of 20637696 is about 274.2965868706.

The spelling of 20637696 in words is "twenty million, six hundred thirty-seven thousand, six hundred ninety-six".