20801144 has 32 divisors (see below), whose sum is σ = 48004320. Its totient is φ = 8228736.

The previous prime is 20801117. The next prime is 20801167. The reversal of 20801144 is 44110802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13559 + ... + 15014.

It is an arithmetic number, because the mean of its divisors is an integer number (1500135).

Almost surely, 2^20801144 is an apocalyptic number.

It is an amenable number.

20801144 is an abundant number, since it is smaller than the sum of its proper divisors (27203176).

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

20801144 is a wasteful number, since it uses less digits than its factorization.

20801144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28599 (or 28595 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 20801144 is about 4560.8271179688. The cubic root of 20801144 is about 275.0188152416.

Adding to 20801144 its reverse (44110802), we get a palindrome (64911946).

The spelling of 20801144 in words is "twenty million, eight hundred one thousand, one hundred forty-four".