20156448 has 96 divisors (see below), whose sum is σ = 58931712. Its totient is φ = 5990400.

The previous prime is 20156431. The next prime is 20156489. The reversal of 20156448 is 84465102.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38428 + ... + 38948.

It is an arithmetic number, because the mean of its divisors is an integer number (613872).

Almost surely, 2^20156448 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 20156448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29465856).

20156448 is an abundant number, since it is smaller than the sum of its proper divisors (38775264).

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

20156448 is a wasteful number, since it uses less digits than its factorization.

20156448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20156448 is about 4489.5933000663. The cubic root of 20156448 is about 272.1476994829.

The spelling of 20156448 in words is "twenty million, one hundred fifty-six thousand, four hundred forty-eight".