21455450153552 has 40 divisors (see below), whose sum is σ = 43759909082400. Its totient is φ = 10162624148352.

The previous prime is 21455450153513. The next prime is 21455450153611. The reversal of 21455450153552 is 25535105455412.

It is a junction number, because it is equal to n+sod(n) for n = 21455450153497 and 21455450153506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4756898 + ... + 8095614.

It is an arithmetic number, because the mean of its divisors is an integer number (1093997727060).

Almost surely, 2^{21455450153552} is an apocalyptic number.

It is an amenable number.

21455450153552 is an abundant number, since it is smaller than the sum of its proper divisors (22304458928848).

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

21455450153552 is a wasteful number, since it uses less digits than its factorization.

21455450153552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359883 (or 3359877 counting only the distinct ones).

The product of its (nonzero) digits is 3000000, while the sum is 47.

The spelling of 21455450153552 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, one hundred fifty-three thousand, five hundred fifty-two".