20159456 has 48 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 9394560.

The previous prime is 20159449. The next prime is 20159497. The reversal of 20159456 is 65495102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 42935 + ... + 43401.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^20159456 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 20159456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21228480).

20159456 is an abundant number, since it is smaller than the sum of its proper divisors (22297504).

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

20159456 is a wasteful number, since it uses less digits than its factorization.

20159456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 559 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 20159456 is about 4489.9282845052. The cubic root of 20159456 is about 272.1612365830.

The spelling of 20159456 in words is "twenty million, one hundred fifty-nine thousand, four hundred fifty-six".