20061144 has 24 divisors (see below), whose sum is σ = 54332460. Its totient is φ = 6687024.

The previous prime is 20061137. The next prime is 20061161. The reversal of 20061144 is 44116002.

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 (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139242 + ... + 139385.

Almost surely, 2^20061144 is an apocalyptic number.

20061144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20061144 is an abundant number, since it is smaller than the sum of its proper divisors (34271316).

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

20061144 is a wasteful number, since it uses less digits than its factorization.

20061144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278639 (or 278632 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 20061144 is about 4478.9668451553. The cubic root of 20061144 is about 271.7180974971.

Adding to 20061144 its reverse (44116002), we get a palindrome (64177146).

The spelling of 20061144 in words is "twenty million, sixty-one thousand, one hundred forty-four".