20323647651 has 8 divisors (see below), whose sum is σ = 27098939584. Its totient is φ = 13548727080.

The previous prime is 20323647623. The next prime is 20323647653. The reversal of 20323647651 is 15674632302.

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

It is not a de Polignac number, because 20323647651 - 2¹⁰ = 20323646627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20323647653) 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, 81780 + ... + 217566.

It is an arithmetic number, because the mean of its divisors is an integer number (3387367448).

Almost surely, 2^20323647651 is an apocalyptic number.

20323647651 is a deficient number, since it is larger than the sum of its proper divisors (6775291933).

20323647651 is a wasteful number, since it uses less digits than its factorization.

20323647651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185681.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 20323647651 in words is "twenty billion, three hundred twenty-three million, six hundred forty-seven thousand, six hundred fifty-one".