20321742351 has 8 divisors (see below), whose sum is σ = 27096737920. Its totient is φ = 13547287512.

The previous prime is 20321742341. The next prime is 20321742377. The reversal of 20321742351 is 15324712302.

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

It is not a de Polignac number, because 20321742351 - 2⁷ = 20321742223 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 (20321742341) 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, 37381 + ... + 205038.

It is an arithmetic number, because the mean of its divisors is an integer number (3387092240).

Almost surely, 2^20321742351 is an apocalyptic number.

20321742351 is a deficient number, since it is larger than the sum of its proper divisors (6774995569).

20321742351 is a wasteful number, since it uses less digits than its factorization.

20321742351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270365.

The product of its (nonzero) digits is 10080, while the sum is 30.

The spelling of 20321742351 in words is "twenty billion, three hundred twenty-one million, seven hundred forty-two thousand, three hundred fifty-one".