20305301331 has 8 divisors (see below), whose sum is σ = 30941411584. Its totient is φ = 11603029320.

The previous prime is 20305301327. The next prime is 20305301369. The reversal of 20305301331 is 13310350302.

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

It is not a de Polignac number, because 20305301331 - 2² = 20305301327 is a prime.

It is a super-2 number, since 2×20305301331² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 966919111 = 20305301331 / (2 + 0 + 3 + 0 + 5 + 3 + 0 + 1 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20305301298 and 20305301307.

It is not an unprimeable number, because it can be changed into a prime (20305301371) 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, 483459535 + ... + 483459576.

It is an arithmetic number, because the mean of its divisors is an integer number (3867676448).

Almost surely, 2^20305301331 is an apocalyptic number.

20305301331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20305301331 is a deficient number, since it is larger than the sum of its proper divisors (10636110253).

20305301331 is an equidigital number, since it uses as much as digits as its factorization.

20305301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966919121.

The product of its (nonzero) digits is 810, while the sum is 21.

Adding to 20305301331 its reverse (13310350302), we get a palindrome (33615651633).

The spelling of 20305301331 in words is "twenty billion, three hundred five million, three hundred one thousand, three hundred thirty-one".