20331643243 has 8 divisors (see below), whose sum is σ = 20434429440. Its totient is φ = 20229005160.

The previous prime is 20331643237. The next prime is 20331643249. The reversal of 20331643243 is 34234613302.

It is an interprime number because it is at equal distance from previous prime (20331643237) and next prime (20331643249).

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 20331643243 - 2²¹ = 20329546091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20331643249) 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, 243546 + ... + 316192.

It is an arithmetic number, because the mean of its divisors is an integer number (2554303680).

Almost surely, 2^20331643243 is an apocalyptic number.

20331643243 is a deficient number, since it is larger than the sum of its proper divisors (102786197).

20331643243 is a wasteful number, since it uses less digits than its factorization.

20331643243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74057.

The product of its (nonzero) digits is 31104, while the sum is 31.

The spelling of 20331643243 in words is "twenty billion, three hundred thirty-one million, six hundred forty-three thousand, two hundred forty-three".