20233530021 has 8 divisors (see below), whose sum is σ = 27256164544. Its totient is φ = 13349957760.

The previous prime is 20233530013. The next prime is 20233530041. The reversal of 20233530021 is 12003533202.

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

It is not a de Polignac number, because 20233530021 - 2³ = 20233530013 is a prime.

It is a super-2 number, since 2×20233530021² (a number of 21 digits) contains 22 as substring.

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 20233530021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20233530011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34765225 + ... + 34765806.

It is an arithmetic number, because the mean of its divisors is an integer number (3407020568).

Almost surely, 2^20233530021 is an apocalyptic number.

It is an amenable number.

20233530021 is a deficient number, since it is larger than the sum of its proper divisors (7022634523).

20233530021 is an equidigital number, since it uses as much as digits as its factorization.

20233530021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69531131.

The product of its (nonzero) digits is 1080, while the sum is 21.

The spelling of 20233530021 in words is "twenty billion, two hundred thirty-three million, five hundred thirty thousand, twenty-one".