20331147765 has 8 divisors (see below), whose sum is σ = 32529836448. Its totient is φ = 10843278800.

The previous prime is 20331147761. The next prime is 20331147799. The reversal of 20331147765 is 56774113302.

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

It is not a de Polignac number, because 20331147765 - 2² = 20331147761 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20331147761) 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, 677704911 + ... + 677704940.

It is an arithmetic number, because the mean of its divisors is an integer number (4066229556).

Almost surely, 2^20331147765 is an apocalyptic number.

It is an amenable number.

20331147765 is a deficient number, since it is larger than the sum of its proper divisors (12198688683).

20331147765 is a wasteful number, since it uses less digits than its factorization.

20331147765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355409859.

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 20331147765 in words is "twenty billion, three hundred thirty-one million, one hundred forty-seven thousand, seven hundred sixty-five".