21014322144 has 24 divisors (see below), whose sum is σ = 55162595880. Its totient is φ = 7004774016.

The previous prime is 21014322137. The next prime is 21014322151. The reversal of 21014322144 is 44122341012.

It is an interprime number because it is at equal distance from previous prime (21014322137) and next prime (21014322151).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109449499 + ... + 109449690.

It is an arithmetic number, because the mean of its divisors is an integer number (2298441495).

Almost surely, 2^21014322144 is an apocalyptic number.

21014322144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21014322144 is an abundant number, since it is smaller than the sum of its proper divisors (34148273736).

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

21014322144 is a wasteful number, since it uses less digits than its factorization.

21014322144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218899202 (or 218899194 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 21014322144 its reverse (44122341012), we get a palindrome (65136663156).

The spelling of 21014322144 in words is "twenty-one billion, fourteen million, three hundred twenty-two thousand, one hundred forty-four".