20213115155 has 8 divisors (see below), whose sum is σ = 24260136432. Its totient is φ = 16167559968.

The previous prime is 20213115151. The next prime is 20213115179. The reversal of 20213115155 is 55151131202.

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 20213115155 - 2² = 20213115151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213115151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335957 + ... + 391526.

It is an arithmetic number, because the mean of its divisors is an integer number (3032517054).

Almost surely, 2^20213115155 is an apocalyptic number.

20213115155 is a deficient number, since it is larger than the sum of its proper divisors (4047021277).

20213115155 is an equidigital number, since it uses as much as digits as its factorization.

20213115155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733045.

The product of its (nonzero) digits is 1500, while the sum is 26.

Adding to 20213115155 its reverse (55151131202), we get a palindrome (75364246357).

The spelling of 20213115155 in words is "twenty billion, two hundred thirteen million, one hundred fifteen thousand, one hundred fifty-five".