20435657065 has 8 divisors (see below), whose sum is σ = 24523613568. Its totient is φ = 16347975600.

The previous prime is 20435657059. The next prime is 20435657117. The reversal of 20435657065 is 56075653402.

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

It is not a de Polignac number, because 20435657065 - 2³ = 20435657057 is a prime.

It is a Duffinian 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, 170224 + ... + 264286.

It is an arithmetic number, because the mean of its divisors is an integer number (3065451696).

Almost surely, 2^20435657065 is an apocalyptic number.

It is an amenable number.

20435657065 is a deficient number, since it is larger than the sum of its proper divisors (4087956503).

20435657065 is an equidigital number, since it uses as much as digits as its factorization.

20435657065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137519.

The product of its (nonzero) digits is 756000, while the sum is 43.

The spelling of 20435657065 in words is "twenty billion, four hundred thirty-five million, six hundred fifty-seven thousand, sixty-five".