21520003014444 has 48 divisors (see below), whose sum is σ = 55280741725440. Its totient is φ = 6461385387840.

The previous prime is 21520003014409. The next prime is 21520003014451. The reversal of 21520003014444 is 44441030002512.

It is a super-2 number, since 2×21520003014444² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 747831144 + ... + 747859919.

It is an arithmetic number, because the mean of its divisors is an integer number (1151682119280).

Almost surely, 2^{21520003014444} is an apocalyptic number.

It is an amenable number.

21520003014444 is an abundant number, since it is smaller than the sum of its proper divisors (33760738710996).

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

21520003014444 is a wasteful number, since it uses less digits than its factorization.

21520003014444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495691190 (or 1495691188 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

Adding to 21520003014444 its reverse (44441030002512), we get a palindrome (65961033016956).

The spelling of 21520003014444 in words is "twenty-one trillion, five hundred twenty billion, three million, fourteen thousand, four hundred forty-four".