21354661341522 has 12 divisors (see below), whose sum is σ = 46268432906670. Its totient is φ = 7118220447168.

The previous prime is 21354661341499. The next prime is 21354661341617. The reversal of 21354661341522 is 22514316645312.

21354661341522 is a `hidden beast` number, since 2 + 1 + 3 + 5 + 4 + 6 + 613 + 4 + 1 + 5 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21351690982521 + 2970359001 = 4620789^2 + 54501^2 .

It is a super-2 number, since 2×21354661341522² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 593185037247 + ... + 593185037282.

Almost surely, 2^{21354661341522} is an apocalyptic number.

21354661341522 is an abundant number, since it is smaller than the sum of its proper divisors (24913771565148).

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

21354661341522 is a wasteful number, since it uses less digits than its factorization.

21354661341522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186370074537 (or 1186370074534 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

Adding to 21354661341522 its reverse (22514316645312), we get a palindrome (43868977986834).

The spelling of 21354661341522 in words is "twenty-one trillion, three hundred fifty-four billion, six hundred sixty-one million, three hundred forty-one thousand, five hundred twenty-two".