20772913447331 has 4 divisors (see below), whose sum is σ = 20772983933664. Its totient is φ = 20772842961000.

The previous prime is 20772913447291. The next prime is 20772913447333. The reversal of 20772913447331 is 13374431927702.

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

It is a cyclic number.

It is not a de Polignac number, because 20772913447331 - 2⁴² = 16374866936227 is a prime.

It is a super-2 number, since 2×20772913447331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20772913447333) 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, 34799240 + ... + 35391141.

It is an arithmetic number, because the mean of its divisors is an integer number (5193245983416).

Almost surely, 2^{20772913447331} is an apocalyptic number.

20772913447331 is a deficient number, since it is larger than the sum of its proper divisors (70486333).

20772913447331 is an equidigital number, since it uses as much as digits as its factorization.

20772913447331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70486332.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 20772913447331 in words is "twenty trillion, seven hundred seventy-two billion, nine hundred thirteen million, four hundred forty-seven thousand, three hundred thirty-one".