20731672045 has 8 divisors (see below), whose sum is σ = 28432007424. Its totient is φ = 14216003664.

The previous prime is 20731672043. The next prime is 20731672067. The reversal of 20731672045 is 54027613702.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20731672045 - 2¹ = 20731672043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20731671995 and 20731672013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20731672043) 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, 296166709 + ... + 296166778.

It is an arithmetic number, because the mean of its divisors is an integer number (3554000928).

Almost surely, 2^20731672045 is an apocalyptic number.

It is an amenable number.

20731672045 is a deficient number, since it is larger than the sum of its proper divisors (7700335379).

20731672045 is an equidigital number, since it uses as much as digits as its factorization.

20731672045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592333499.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 20731672045 in words is "twenty billion, seven hundred thirty-one million, six hundred seventy-two thousand, forty-five".