20238816 has 48 divisors (see below), whose sum is σ = 57217104. Its totient is φ = 6226944.

The previous prime is 20238809. The next prime is 20238821. The reversal of 20238816 is 61883202.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6861 + ... + 9356.

It is an arithmetic number, because the mean of its divisors is an integer number (1192023).

Almost surely, 2^20238816 is an apocalyptic number.

20238816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20238816 is an abundant number, since it is smaller than the sum of its proper divisors (36978288).

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

20238816 is a wasteful number, since it uses less digits than its factorization.

20238816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16243 (or 16235 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 20238816 is about 4498.7571617059. The cubic root of 20238816 is about 272.5179002353.

The spelling of 20238816 in words is "twenty million, two hundred thirty-eight thousand, eight hundred sixteen".