20632011155 has 32 divisors (see below), whose sum is σ = 30406980096. Its totient is φ = 13116685824.

The previous prime is 20632011133. The next prime is 20632011173. The reversal of 20632011155 is 55111023602.

It is a cyclic number.

It is not a de Polignac number, because 20632011155 - 2⁶ = 20632011091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 218909 + ... + 298638.

It is an arithmetic number, because the mean of its divisors is an integer number (950218128).

Almost surely, 2^20632011155 is an apocalyptic number.

20632011155 is a deficient number, since it is larger than the sum of its proper divisors (9774968941).

20632011155 is a wasteful number, since it uses less digits than its factorization.

20632011155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517643.

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 20632011155 its reverse (55111023602), we get a palindrome (75743034757).

The spelling of 20632011155 in words is "twenty billion, six hundred thirty-two million, eleven thousand, one hundred fifty-five".