23031140021 has 8 divisors (see below), whose sum is σ = 23238329880. Its totient is φ = 22824801792.

The previous prime is 23031140017. The next prime is 23031140023. The reversal of 23031140021 is 12004113032.

It can be written as a sum of positive squares in 4 ways, for example, as 8429076100 + 14602063921 = 91810^2 + 120839^2 .

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 23031140021 - 2² = 23031140017 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 (23031140023) 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, 158516 + ... + 266813.

It is an arithmetic number, because the mean of its divisors is an integer number (2904791235).

Almost surely, 2^23031140021 is an apocalyptic number.

It is an amenable number.

23031140021 is a deficient number, since it is larger than the sum of its proper divisors (207189859).

23031140021 is a wasteful number, since it uses less digits than its factorization.

23031140021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425815.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 23031140021 its reverse (12004113032), we get a palindrome (35035253053).

The spelling of 23031140021 in words is "twenty-three billion, thirty-one million, one hundred forty thousand, twenty-one".