21355352455246 has 32 divisors (see below), whose sum is σ = 35040877966080. Its totient is φ = 9733577145600.

The previous prime is 21355352455237. The next prime is 21355352455331. The reversal of 21355352455246 is 64255425355312.

It is a junction number, because it is equal to n+sod(n) for n = 21355352455193 and 21355352455202.

It is a congruent number.

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, 144771181 + ... + 144918616.

It is an arithmetic number, because the mean of its divisors is an integer number (1095027436440).

Almost surely, 2^{21355352455246} is an apocalyptic number.

21355352455246 is a deficient number, since it is larger than the sum of its proper divisors (13685525510834).

21355352455246 is a wasteful number, since it uses less digits than its factorization.

21355352455246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289689900.

The product of its digits is 21600000, while the sum is 52.

The spelling of 21355352455246 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred fifty-two million, four hundred fifty-five thousand, two hundred forty-six".