20534144 has 16 divisors (see below), whose sum is σ = 40908120. Its totient is φ = 10267008.

The previous prime is 20534141. The next prime is 20534167. The reversal of 20534144 is 44143502.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20534141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80084 + ... + 80339.

Almost surely, 2^20534144 is an apocalyptic number.

It is an amenable number.

20534144 is a deficient number, since it is larger than the sum of its proper divisors (20373976).

20534144 is an equidigital number, since it uses as much as digits as its factorization.

20534144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160437 (or 160425 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20534144 is about 4531.4615743709. The cubic root of 20534144 is about 273.8370459131.

Adding to 20534144 its reverse (44143502), we get a palindrome (64677646).

The spelling of 20534144 in words is "twenty million, five hundred thirty-four thousand, one hundred forty-four".