21860547936810 has 128 divisors (see below), whose sum is σ = 57339676880640. Its totient is φ = 5289831628800.

The previous prime is 21860547936797. The next prime is 21860547936839. The reversal of 21860547936810 is 1863974506812.

It is a happy number.

It is a super-2 number, since 2×21860547936810² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 500666380 + ... + 500710040.

It is an arithmetic number, because the mean of its divisors is an integer number (447966225630).

It is a 2-persistent number, because it is pandigital, and so is 2⋅21860547936810 = 43721095873620, but 3⋅21860547936810 = 65581643810430 is not.

Almost surely, 2^{21860547936810} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21860547936810, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28669838440320).

21860547936810 is an abundant number, since it is smaller than the sum of its proper divisors (35479128943830).

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

21860547936810 is a wasteful number, since it uses less digits than its factorization.

21860547936810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46424.

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 21860547936810 in words is "twenty-one trillion, eight hundred sixty billion, five hundred forty-seven million, nine hundred thirty-six thousand, eight hundred ten".