20320335371 has 4 divisors (see below), whose sum is σ = 23223240432. Its totient is φ = 17417430312.

The previous prime is 20320335283. The next prime is 20320335379. The reversal of 20320335371 is 17353302302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20320335371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20320335379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451452520 + ... + 1451452533.

It is an arithmetic number, because the mean of its divisors is an integer number (5805810108).

Almost surely, 2^20320335371 is an apocalyptic number.

20320335371 is a deficient number, since it is larger than the sum of its proper divisors (2902905061).

20320335371 is an equidigital number, since it uses as much as digits as its factorization.

20320335371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2902905060.

The product of its (nonzero) digits is 11340, while the sum is 29.

Adding to 20320335371 its reverse (17353302302), we get a palindrome (37673637673).

The spelling of 20320335371 in words is "twenty billion, three hundred twenty million, three hundred thirty-five thousand, three hundred seventy-one".