20342383991 has 8 divisors (see below), whose sum is σ = 22672626480. Its totient is φ = 18138100608.

The previous prime is 20342383973. The next prime is 20342384009. The reversal of 20342383991 is 19938324302.

It is an interprime number because it is at equal distance from previous prime (20342383973) and next prime (20342384009).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20342383991 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 (20342383921) 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, 31489436 + ... + 31490081.

It is an arithmetic number, because the mean of its divisors is an integer number (2834078310).

Almost surely, 2^20342383991 is an apocalyptic number.

20342383991 is a deficient number, since it is larger than the sum of its proper divisors (2330242489).

20342383991 is a wasteful number, since it uses less digits than its factorization.

20342383991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62979553.

The product of its (nonzero) digits is 279936, while the sum is 44.

The spelling of 20342383991 in words is "twenty billion, three hundred forty-two million, three hundred eighty-three thousand, nine hundred ninety-one".