20022005531 has 4 divisors (see below), whose sum is σ = 21842187864. Its totient is φ = 18201823200.

The previous prime is 20022005519. The next prime is 20022005533. The reversal of 20022005531 is 13550022002.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20022005531 - 2²² = 20017811227 is a prime.

It is a super-2 number, since 2×20022005531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20022005533) 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 3 ways as a sum of consecutive naturals, for example, 910091150 + ... + 910091171.

It is an arithmetic number, because the mean of its divisors is an integer number (5460546966).

Almost surely, 2^20022005531 is an apocalyptic number.

20022005531 is a deficient number, since it is larger than the sum of its proper divisors (1820182333).

20022005531 is a wasteful number, since it uses less digits than its factorization.

20022005531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1820182332.

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 20022005531 its reverse (13550022002), we get a palindrome (33572027533).

The spelling of 20022005531 in words is "twenty billion, twenty-two million, five thousand, five hundred thirty-one".