20859696 has 120 divisors (see below), whose sum is σ = 68651856. Its totient is φ = 5829120.

The previous prime is 20859691. The next prime is 20859719. The reversal of 20859696 is 69695802.

It is not an unprimeable number, because it can be changed into a prime (20859691) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20086 + ... + 21098.

Almost surely, 2^20859696 is an apocalyptic number.

20859696 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 20859696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34325928).

20859696 is an abundant number, since it is smaller than the sum of its proper divisors (47792160).

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

20859696 is a wasteful number, since it uses less digits than its factorization.

20859696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1051 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 20859696 is about 4567.2416183075. The cubic root of 20859696 is about 275.2766186296.

It can be divided in two parts, 2085 and 9696, that added together give a triangular number (11781 = T₁₅₃).

The spelling of 20859696 in words is "twenty million, eight hundred fifty-nine thousand, six hundred ninety-six".