20304665645 has 8 divisors (see below), whose sum is σ = 26580653280. Its totient is φ = 14767029520.

The previous prime is 20304665629. The next prime is 20304665651. The reversal of 20304665645 is 54656640302.

It is a happy number.

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

It is not a de Polignac number, because 20304665645 - 2⁴ = 20304665629 is a prime.

It is a super-3 number, since 3×20304665645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 184587815 + ... + 184587924.

It is an arithmetic number, because the mean of its divisors is an integer number (3322581660).

Almost surely, 2^20304665645 is an apocalyptic number.

It is an amenable number.

20304665645 is a deficient number, since it is larger than the sum of its proper divisors (6275987635).

20304665645 is a wasteful number, since it uses less digits than its factorization.

20304665645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369175755.

The product of its (nonzero) digits is 518400, while the sum is 41.

The spelling of 20304665645 in words is "twenty billion, three hundred four million, six hundred sixty-five thousand, six hundred forty-five".