20440342424999 has 8 divisors (see below), whose sum is σ = 23503706628480. Its totient is φ = 17412807042936.

The previous prime is 20440342424981. The next prime is 20440342425053. The reversal of 20440342424999 is 99942424304402.

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 20440342424999 - 2²⁰ = 20440341376423 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 (20440342424959) 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, 8957204129 + ... + 8957206410.

It is an arithmetic number, because the mean of its divisors is an integer number (2937963328560).

Almost surely, 2^{20440342424999} is an apocalyptic number.

20440342424999 is a deficient number, since it is larger than the sum of its proper divisors (3063364203481).

20440342424999 is a wasteful number, since it uses less digits than its factorization.

20440342424999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17914410709.

The product of its (nonzero) digits is 17915904, while the sum is 56.

The spelling of 20440342424999 in words is "twenty trillion, four hundred forty billion, three hundred forty-two million, four hundred twenty-four thousand, nine hundred ninety-nine".