20156002255 has 4 divisors (see below), whose sum is σ = 24187202712. Its totient is φ = 16124801800.

The previous prime is 20156002249. The next prime is 20156002259. The reversal of 20156002255 is 55220065102.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20156002255 - 2²¹ = 20153905103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20156002259) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2015600221 + ... + 2015600230.

It is an arithmetic number, because the mean of its divisors is an integer number (6046800678).

Almost surely, 2^20156002255 is an apocalyptic number.

20156002255 is a deficient number, since it is larger than the sum of its proper divisors (4031200457).

20156002255 is an equidigital number, since it uses as much as digits as its factorization.

20156002255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4031200456.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 20156002255 its reverse (55220065102), we get a palindrome (75376067357).

The spelling of 20156002255 in words is "twenty billion, one hundred fifty-six million, two thousand, two hundred fifty-five".