20356423354155 has 32 divisors (see below), whose sum is σ = 37244336025600. Its totient is φ = 9300503060352.

The previous prime is 20356423354153. The next prime is 20356423354217. The reversal of 20356423354155 is 55145332465302.

It is not a de Polignac number, because 20356423354155 - 2¹ = 20356423354153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20356423354153) 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 31 ways as a sum of consecutive naturals, for example, 54923520 + ... + 55292909.

It is an arithmetic number, because the mean of its divisors is an integer number (1163885500800).

Almost surely, 2^{20356423354155} is an apocalyptic number.

20356423354155 is a deficient number, since it is larger than the sum of its proper divisors (16887912671445).

20356423354155 is a wasteful number, since it uses less digits than its factorization.

20356423354155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110218203.

The product of its (nonzero) digits is 6480000, while the sum is 48.

The spelling of 20356423354155 in words is "twenty trillion, three hundred fifty-six billion, four hundred twenty-three million, three hundred fifty-four thousand, one hundred fifty-five".