21872749429344 has 48 divisors (see below), whose sum is σ = 62635600641600. Its totient is φ = 6628105887360.

The previous prime is 21872749429309. The next prime is 21872749429357. The reversal of 21872749429344 is 44392494727812.

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

It is a Harshad number since it is a multiple of its sum of digits (66).

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, 10356414394 + ... + 10356416505.

It is an arithmetic number, because the mean of its divisors is an integer number (1304908346700).

Almost surely, 2^{21872749429344} is an apocalyptic number.

21872749429344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21872749429344 is an abundant number, since it is smaller than the sum of its proper divisors (40762851212256).

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

21872749429344 is a wasteful number, since it uses less digits than its factorization.

21872749429344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20712830923 (or 20712830915 counting only the distinct ones).

The product of its digits is 195084288, while the sum is 66.

The spelling of 21872749429344 in words is "twenty-one trillion, eight hundred seventy-two billion, seven hundred forty-nine million, four hundred twenty-nine thousand, three hundred forty-four".