20744001 has 12 divisors (see below), whose sum is σ = 30003220. Its totient is φ = 13811040.

The previous prime is 20743979. The next prime is 20744021. The reversal of 20744001 is 10044702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10246401 + 10497600 = 3201^2 + 3240^2 .

It is not a de Polignac number, because 20744001 - 2¹³ = 20735809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20744021) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11595 + ... + 13263.

Almost surely, 2^20744001 is an apocalyptic number.

It is an amenable number.

20744001 is a deficient number, since it is larger than the sum of its proper divisors (9259219).

20744001 is a wasteful number, since it uses less digits than its factorization.

20744001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056 (or 3053 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 20744001 is about 4554.5582661769. The cubic root of 20744001 is about 274.7667487719.

Adding to 20744001 its reverse (10044702), we get a palindrome (30788703).

The spelling of 20744001 in words is "twenty million, seven hundred forty-four thousand, one".