21014323401440 has 48 divisors (see below), whose sum is σ = 49646621007648. Its totient is φ = 8405681619456.

The previous prime is 21014323401439. The next prime is 21014323401443. The reversal of 21014323401440 is 4410432341012.

It is a super-2 number, since 2×21014323401440² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014323401443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45339509 + ... + 45800651.

It is an arithmetic number, because the mean of its divisors is an integer number (1034304604326).

Almost surely, 2^{21014323401440} is an apocalyptic number.

21014323401440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21014323401440 is an abundant number, since it is smaller than the sum of its proper divisors (28632297606208).

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

21014323401440 is a wasteful number, since it uses less digits than its factorization.

21014323401440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745971 (or 745963 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21014323401440 its reverse (4410432341012), we get a palindrome (25424755742452).

The spelling of 21014323401440 in words is "twenty-one trillion, fourteen billion, three hundred twenty-three million, four hundred one thousand, four hundred forty".