21453531022450 has 24 divisors (see below), whose sum is σ = 40112486922240. Its totient is φ = 8536483544400.

The previous prime is 21453531022447. The next prime is 21453531022477. The reversal of 21453531022450 is 5422013535412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1123211970 + ... + 1123231069.

It is an arithmetic number, because the mean of its divisors is an integer number (1671353621760).

Almost surely, 2^{21453531022450} is an apocalyptic number.

21453531022450 is a deficient number, since it is larger than the sum of its proper divisors (18658955899790).

21453531022450 is a wasteful number, since it uses less digits than its factorization.

21453531022450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2246443242 (or 2246443237 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 21453531022450 its reverse (5422013535412), we get a palindrome (26875544557862).

The spelling of 21453531022450 in words is "twenty-one trillion, four hundred fifty-three billion, five hundred thirty-one million, twenty-two thousand, four hundred fifty".