21343232004420 has 48 divisors (see below), whose sum is σ = 59764053162240. Its totient is φ = 5691242482176.

The previous prime is 21343232004377. The next prime is 21343232004439. The reversal of 21343232004420 is 2440023234312.

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

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, 7734037 + ... + 10124316.

It is an arithmetic number, because the mean of its divisors is an integer number (1245084440880).

Almost surely, 2^{21343232004420} is an apocalyptic number.

21343232004420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21343232004420 is an abundant number, since it is smaller than the sum of its proper divisors (38420821157820).

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

21343232004420 is a wasteful number, since it uses less digits than its factorization.

21343232004420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17878284 (or 17878282 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 30.

Adding to 21343232004420 its reverse (2440023234312), we get a palindrome (23783255238732).

The spelling of 21343232004420 in words is "twenty-one trillion, three hundred forty-three billion, two hundred thirty-two million, four thousand, four hundred twenty".