20444231153 has 16 divisors (see below), whose sum is σ = 20902269696. Its totient is φ = 19991629440.

The previous prime is 20444231063. The next prime is 20444231177. The reversal of 20444231153 is 35113244402.

It is a cyclic number.

It is not a de Polignac number, because 20444231153 - 2¹⁸ = 20443969009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20444231453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5483576 + ... + 5487302.

It is an arithmetic number, because the mean of its divisors is an integer number (1306391856).

Almost surely, 2^20444231153 is an apocalyptic number.

It is an amenable number.

20444231153 is a deficient number, since it is larger than the sum of its proper divisors (458038543).

20444231153 is a wasteful number, since it uses less digits than its factorization.

20444231153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4424.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 20444231153 its reverse (35113244402), we get a palindrome (55557475555).

The spelling of 20444231153 in words is "twenty billion, four hundred forty-four million, two hundred thirty-one thousand, one hundred fifty-three".