20645646295 has 8 divisors (see below), whose sum is σ = 24900537024. Its totient is φ = 16432676064.

The previous prime is 20645646293. The next prime is 20645646313. The reversal of 20645646295 is 59264654602.

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 20645646295 - 2¹ = 20645646293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20645646293) 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, 10479039 + ... + 10481008.

It is an arithmetic number, because the mean of its divisors is an integer number (3112567128).

Almost surely, 2^20645646295 is an apocalyptic number.

20645646295 is a deficient number, since it is larger than the sum of its proper divisors (4254890729).

20645646295 is a wasteful number, since it uses less digits than its factorization.

20645646295 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20960249.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 20645646295 in words is "twenty billion, six hundred forty-five million, six hundred forty-six thousand, two hundred ninety-five".