20021122535 has 16 divisors (see below), whose sum is σ = 24076084896. Its totient is φ = 15983115648.

The previous prime is 20021122531. The next prime is 20021122571. The reversal of 20021122535 is 53522112002.

It is a cyclic number.

It is not a de Polignac number, because 20021122535 - 2² = 20021122531 is a prime.

It is a super-3 number, since 3×20021122535³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20021122535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021122531) 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, 6769277 + ... + 6772233.

It is an arithmetic number, because the mean of its divisors is an integer number (1504755306).

Almost surely, 2^20021122535 is an apocalyptic number.

20021122535 is a deficient number, since it is larger than the sum of its proper divisors (4054962361).

20021122535 is a wasteful number, since it uses less digits than its factorization.

20021122535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5362.

The product of its (nonzero) digits is 1200, while the sum is 23.

Adding to 20021122535 its reverse (53522112002), we get a palindrome (73543234537).

The spelling of 20021122535 in words is "twenty billion, twenty-one million, one hundred twenty-two thousand, five hundred thirty-five".