21036082155 has 16 divisors (see below), whose sum is σ = 36717525504. Its totient is φ = 10199312480.

The previous prime is 21036082153. The next prime is 21036082163. The reversal of 21036082155 is 55128063012.

It is not a de Polignac number, because 21036082155 - 2¹ = 21036082153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (21036082153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63745539 + ... + 63745868.

It is an arithmetic number, because the mean of its divisors is an integer number (2294845344).

Almost surely, 2^21036082155 is an apocalyptic number.

21036082155 is a deficient number, since it is larger than the sum of its proper divisors (15681443349).

21036082155 is a wasteful number, since it uses less digits than its factorization.

21036082155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127491426.

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 21036082155 in words is "twenty-one billion, thirty-six million, eighty-two thousand, one hundred fifty-five".