20535002155 has 8 divisors (see below), whose sum is σ = 24643674000. Its totient is φ = 16426887456.

The previous prime is 20535002143. The next prime is 20535002171. The reversal of 20535002155 is 55120053502.

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 20535002155 - 2¹¹ = 20535000107 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53380 + ... + 209569.

It is an arithmetic number, because the mean of its divisors is an integer number (3080459250).

Almost surely, 2^20535002155 is an apocalyptic number.

20535002155 is a deficient number, since it is larger than the sum of its proper divisors (4108671845).

20535002155 is a wasteful number, since it uses less digits than its factorization.

20535002155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278573.

The product of its (nonzero) digits is 7500, while the sum is 28.

Adding to 20535002155 its reverse (55120053502), we get a palindrome (75655055657).

The spelling of 20535002155 in words is "twenty billion, five hundred thirty-five million, two thousand, one hundred fifty-five".