20110421533 has 8 divisors (see below), whose sum is σ = 20308579200. Its totient is φ = 19912320048.

The previous prime is 20110421491. The next prime is 20110421537. The reversal of 20110421533 is 33512401102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20110421533 - 2⁹ = 20110421021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110421537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355208 + ... + 1369966.

It is an arithmetic number, because the mean of its divisors is an integer number (2538572400).

Almost surely, 2^20110421533 is an apocalyptic number.

It is an amenable number.

20110421533 is a deficient number, since it is larger than the sum of its proper divisors (198157667).

20110421533 is a wasteful number, since it uses less digits than its factorization.

20110421533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28091.

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 20110421533 its reverse (33512401102), we get a palindrome (53622822635).

The spelling of 20110421533 in words is "twenty billion, one hundred ten million, four hundred twenty-one thousand, five hundred thirty-three".