21352001303420 has 24 divisors (see below), whose sum is σ = 45453438394224. Its totient is φ = 8423803253376.

The previous prime is 21352001303389. The next prime is 21352001303429. The reversal of 21352001303420 is 2430310025312.

It is a happy number.

It is a super-2 number, since 2×21352001303420² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21352001303420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352001303429) 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, 7312327754 + ... + 7312330673.

It is an arithmetic number, because the mean of its divisors is an integer number (1893893266426).

Almost surely, 2^{21352001303420} is an apocalyptic number.

21352001303420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21352001303420 is an abundant number, since it is smaller than the sum of its proper divisors (24101437090804).

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

21352001303420 is a wasteful number, since it uses less digits than its factorization.

21352001303420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14624658509 (or 14624658507 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 21352001303420 its reverse (2430310025312), we get a palindrome (23782311328732).

The spelling of 21352001303420 in words is "twenty-one trillion, three hundred fifty-two billion, one million, three hundred three thousand, four hundred twenty".