20161824 has 24 divisors (see below), whose sum is σ = 52925040. Its totient is φ = 6720576.

The previous prime is 20161807. The next prime is 20161837. The reversal of 20161824 is 42816102.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 20161794 and 20161803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104914 + ... + 105105.

It is an arithmetic number, because the mean of its divisors is an integer number (2205210).

Almost surely, 2^20161824 is an apocalyptic number.

20161824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20161824 is an abundant number, since it is smaller than the sum of its proper divisors (32763216).

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

20161824 is a wasteful number, since it uses less digits than its factorization.

20161824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210032 (or 210024 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 20161824 is about 4490.1919780784. The cubic root of 20161824 is about 272.1718925017.

Adding to 20161824 its reverse (42816102), we get a palindrome (62977926).

The spelling of 20161824 in words is "twenty million, one hundred sixty-one thousand, eight hundred twenty-four".