20401244 has 6 divisors (see below), whose sum is σ = 35702184. Its totient is φ = 10200620.

The previous prime is 20401223. The next prime is 20401273. The reversal of 20401244 is 44210402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2550152 + ... + 2550159.

It is an arithmetic number, because the mean of its divisors is an integer number (5950364).

Almost surely, 2^20401244 is an apocalyptic number.

It is an amenable number.

20401244 is a deficient number, since it is larger than the sum of its proper divisors (15300940).

20401244 is a wasteful number, since it uses less digits than its factorization.

20401244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100315 (or 5100313 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 20401244 is about 4516.7736272698. The cubic root of 20401244 is about 273.2449955793.

Adding to 20401244 its reverse (44210402), we get a palindrome (64611646).

The spelling of 20401244 in words is "twenty million, four hundred one thousand, two hundred forty-four".