20135551111 has 8 divisors (see below), whose sum is σ = 22959995184. Its totient is φ = 17493329280.

The previous prime is 20135551103. The next prime is 20135551129. The reversal of 20135551111 is 11115553102.

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 20135551111 - 2³ = 20135551103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20135581111) 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, 45555325 + ... + 45555766.

It is an arithmetic number, because the mean of its divisors is an integer number (2869999398).

Almost surely, 2^20135551111 is an apocalyptic number.

20135551111 is a deficient number, since it is larger than the sum of its proper divisors (2824444073).

20135551111 is a wasteful number, since it uses less digits than its factorization.

20135551111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91111121.

The product of its (nonzero) digits is 750, while the sum is 25.

The spelling of 20135551111 in words is "twenty billion, one hundred thirty-five million, five hundred fifty-one thousand, one hundred eleven".