21444014001400 has 48 divisors (see below), whose sum is σ = 49881500906400. Its totient is φ = 8573447604480.

The previous prime is 21444014001313. The next prime is 21444014001437. The reversal of 21444014001400 is 410041044412.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25573845 + ... + 26399044.

It is an arithmetic number, because the mean of its divisors is an integer number (1039197935550).

Almost surely, 2^{21444014001400} is an apocalyptic number.

21444014001400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21444014001400 is an abundant number, since it is smaller than the sum of its proper divisors (28437486905000).

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

21444014001400 is a wasteful number, since it uses less digits than its factorization.

21444014001400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51974968 (or 51974959 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21444014001400 its reverse (410041044412), we get a palindrome (21854055045812).

The spelling of 21444014001400 in words is "twenty-one trillion, four hundred forty-four billion, fourteen million, one thousand, four hundred".