21544231014 has 64 divisors (see below), whose sum is σ = 49628160000. Its totient is φ = 6920544960.

The previous prime is 21544231001. The next prime is 21544231099. The reversal of 21544231014 is 41013244512.

21544231014 is a `hidden beast` number, since 215 + 4 + 423 + 10 + 14 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 373162 + ... + 427010.

It is an arithmetic number, because the mean of its divisors is an integer number (775440000).

Almost surely, 2^21544231014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21544231014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24814080000).

21544231014 is an abundant number, since it is smaller than the sum of its proper divisors (28083928986).

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

21544231014 is a wasteful number, since it uses less digits than its factorization.

21544231014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54130 (or 54124 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 21544231014 its reverse (41013244512), we get a palindrome (62557475526).

The spelling of 21544231014 in words is "twenty-one billion, five hundred forty-four million, two hundred thirty-one thousand, fourteen".