21342133340432 has 20 divisors (see below), whose sum is σ = 41370369096780. Its totient is φ = 10665909057408.

The previous prime is 21342133340389. The next prime is 21342133340477. The reversal of 21342133340432 is 23404333124312.

It can be written as a sum of positive squares in 2 ways, for example, as 11090072190976 + 10252061149456 = 3330176^2 + 3201884^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21342133340392 and 21342133340401.

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, 322316663 + ... + 322382870.

It is an arithmetic number, because the mean of its divisors is an integer number (2068518454839).

Almost surely, 2^{21342133340432} is an apocalyptic number.

It is an amenable number.

21342133340432 is a deficient number, since it is larger than the sum of its proper divisors (20028235756348).

21342133340432 is a wasteful number, since it uses less digits than its factorization.

21342133340432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644701610 (or 644701604 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 35.

Adding to 21342133340432 its reverse (23404333124312), we get a palindrome (44746466464744).

The spelling of 21342133340432 in words is "twenty-one trillion, three hundred forty-two billion, one hundred thirty-three million, three hundred forty thousand, four hundred thirty-two".