21334210303440 has 80 divisors (see below), whose sum is σ = 66202387740288. Its totient is φ = 5683416442368.

The previous prime is 21334210303433. The next prime is 21334210303459. The reversal of 21334210303440 is 4430301243312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 21334210303398 and 21334210303407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44340732 + ... + 44819291.

Almost surely, 2^{21334210303440} is an apocalyptic number.

21334210303440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334210303440 is an abundant number, since it is smaller than the sum of its proper divisors (44868177436848).

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

21334210303440 is a wasteful number, since it uses less digits than its factorization.

21334210303440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89161036 (or 89161030 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21334210303440 its reverse (4430301243312), we get a palindrome (25764511546752).

The spelling of 21334210303440 in words is "twenty-one trillion, three hundred thirty-four billion, two hundred ten million, three hundred three thousand, four hundred forty".