20533121441 has 32 divisors (see below), whose sum is σ = 25158615552. Its totient is φ = 16357985280.

The previous prime is 20533121387. The next prime is 20533121447. The reversal of 20533121441 is 14412133502.

It is a happy number.

It is not a de Polignac number, because 20533121441 - 2⁶ = 20533121377 is a prime.

It is a super-2 number, since 2×20533121441² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20533121441.

It is not an unprimeable number, because it can be changed into a prime (20533121447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3116771 + ... + 3123351.

It is an arithmetic number, because the mean of its divisors is an integer number (786206736).

Almost surely, 2^20533121441 is an apocalyptic number.

It is an amenable number.

20533121441 is a deficient number, since it is larger than the sum of its proper divisors (4625494111).

20533121441 is a wasteful number, since it uses less digits than its factorization.

20533121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20533121441 its reverse (14412133502), we get a palindrome (34945254943).

The spelling of 20533121441 in words is "twenty billion, five hundred thirty-three million, one hundred twenty-one thousand, four hundred forty-one".