21516141623152 has 40 divisors (see below), whose sum is σ = 45667581016320. Its totient is φ = 9739143583680.

The previous prime is 21516141623117. The next prime is 21516141623209. The reversal of 21516141623152 is 25132614161512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255712758 + ... + 255796885.

It is an arithmetic number, because the mean of its divisors is an integer number (1141689525408).

Almost surely, 2^{21516141623152} is an apocalyptic number.

21516141623152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21516141623152 is an abundant number, since it is smaller than the sum of its proper divisors (24151439393168).

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

21516141623152 is a wasteful number, since it uses less digits than its factorization.

21516141623152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511509901 (or 511509895 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

Adding to 21516141623152 its reverse (25132614161512), we get a palindrome (46648755784664).

The spelling of 21516141623152 in words is "twenty-one trillion, five hundred sixteen billion, one hundred forty-one million, six hundred twenty-three thousand, one hundred fifty-two".