21541063022372 has 24 divisors (see below), whose sum is σ = 37795568199480. Its totient is φ = 10742331891200.

The previous prime is 21541063022359. The next prime is 21541063022383. The reversal of 21541063022372 is 27322036014512.

It can be written as a sum of positive squares in 4 ways, for example, as 2279357140516 + 19261705881856 = 1509754^2 + 4388816^2 .

It is a super-2 number, since 2×21541063022372² (a number of 27 digits) contains 22 as substring.

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, 33447788 + ... + 34085724.

It is an arithmetic number, because the mean of its divisors is an integer number (1574815341645).

Almost surely, 2^{21541063022372} is an apocalyptic number.

It is an amenable number.

21541063022372 is a deficient number, since it is larger than the sum of its proper divisors (16254505177108).

21541063022372 is a wasteful number, since it uses less digits than its factorization.

21541063022372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660031 (or 660029 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 21541063022372 its reverse (27322036014512), we get a palindrome (48863099036884).

The spelling of 21541063022372 in words is "twenty-one trillion, five hundred forty-one billion, sixty-three million, twenty-two thousand, three hundred seventy-two".