21414104544 has 48 divisors (see below), whose sum is σ = 64242315648. Its totient is φ = 6118315392.

The previous prime is 21414104539. The next prime is 21414104549. The reversal of 21414104544 is 44540141412.

It is an interprime number because it is at equal distance from previous prime (21414104539) and next prime (21414104549).

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×21414104544² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21414104549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15932442 + ... + 15933785.

It is an arithmetic number, because the mean of its divisors is an integer number (1338381576).

Almost surely, 2^21414104544 is an apocalyptic number.

21414104544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21414104544 is an abundant number, since it is smaller than the sum of its proper divisors (42828211104).

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

21414104544 is a wasteful number, since it uses less digits than its factorization.

21414104544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31866247 (or 31866239 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 21414104544 its reverse (44540141412), we get a palindrome (65954245956).

The spelling of 21414104544 in words is "twenty-one billion, four hundred fourteen million, one hundred four thousand, five hundred forty-four".