21155153545326 has 16 divisors (see below), whose sum is σ = 42941804212224. Its totient is φ = 6946468328184.

The previous prime is 21155153545321. The next prime is 21155153545343. The reversal of 21155153545326 is 62354535155112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21155153545321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26312379630 + ... + 26312380433.

It is an arithmetic number, because the mean of its divisors is an integer number (2683862763264).

Almost surely, 2^{21155153545326} is an apocalyptic number.

21155153545326 is an abundant number, since it is smaller than the sum of its proper divisors (21786650666898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21155153545326 is a wasteful number, since it uses less digits than its factorization.

21155153545326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52624760135.

The product of its digits is 2700000, while the sum is 48.

The spelling of 21155153545326 in words is "twenty-one trillion, one hundred fifty-five billion, one hundred fifty-three million, five hundred forty-five thousand, three hundred twenty-six".