20012200155 has 48 divisors (see below), whose sum is σ = 35292625056. Its totient is φ = 10487439360.

The previous prime is 20012200139. The next prime is 20012200183. The reversal of 20012200155 is 55100221002.

It is not a de Polignac number, because 20012200155 - 2⁴ = 20012200139 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3161824 + ... + 3168146.

It is an arithmetic number, because the mean of its divisors is an integer number (735263022).

Almost surely, 2^20012200155 is an apocalyptic number.

20012200155 is a deficient number, since it is larger than the sum of its proper divisors (15280424901).

20012200155 is a wasteful number, since it uses less digits than its factorization.

20012200155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7548 (or 7545 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

Adding to 20012200155 its reverse (55100221002), we get a palindrome (75112421157).

The spelling of 20012200155 in words is "twenty billion, twelve million, two hundred thousand, one hundred fifty-five".