21500236037150 has 96 divisors (see below), whose sum is σ = 43510726572768. Its totient is φ = 7856890675200.

The previous prime is 21500236037149. The next prime is 21500236037197. The reversal of 21500236037150 is 5173063200512.

It is a super-3 number, since 3×21500236037150³ (a number of 41 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21500236037150.

It is a congruent number.

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, 50542142 + ... + 50965758.

It is an arithmetic number, because the mean of its divisors is an integer number (453236735133).

Almost surely, 2^{21500236037150} is an apocalyptic number.

21500236037150 is an abundant number, since it is smaller than the sum of its proper divisors (22010490535618).

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

21500236037150 is a wasteful number, since it uses less digits than its factorization.

21500236037150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424446 (or 424441 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 35.

Adding to 21500236037150 its reverse (5173063200512), we get a palindrome (26673299237662).

The spelling of 21500236037150 in words is "twenty-one trillion, five hundred billion, two hundred thirty-six million, thirty-seven thousand, one hundred fifty".