20006665535 has 8 divisors (see below), whose sum is σ = 24183240336. Its totient is φ = 15888504640.

The previous prime is 20006665531. The next prime is 20006665537. The reversal of 20006665535 is 53556660002.

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

It is not a de Polignac number, because 20006665535 - 2² = 20006665531 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 (20006665531) 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, 14602721 + ... + 14604090.

It is an arithmetic number, because the mean of its divisors is an integer number (3022905042).

Almost surely, 2^20006665535 is an apocalyptic number.

20006665535 is a deficient number, since it is larger than the sum of its proper divisors (4176574801).

20006665535 is a wasteful number, since it uses less digits than its factorization.

20006665535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29206953.

The product of its (nonzero) digits is 162000, while the sum is 38.

The spelling of 20006665535 in words is "twenty billion, six million, six hundred sixty-five thousand, five hundred thirty-five".