21354462062660 has 12 divisors (see below), whose sum is σ = 44844370331628. Its totient is φ = 8541784825056.

The previous prime is 21354462062627. The next prime is 21354462062669. The reversal of 21354462062660 is 6626026445312.

It can be written as a sum of positive squares in 2 ways, for example, as 4167020003584 + 17187442059076 = 2041328^2 + 4145774^2 .

It is not an unprimeable number, because it can be changed into a prime (21354462062669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533861551547 + ... + 533861551586.

It is an arithmetic number, because the mean of its divisors is an integer number (3737030860969).

Almost surely, 2^{21354462062660} is an apocalyptic number.

21354462062660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21354462062660 is an abundant number, since it is smaller than the sum of its proper divisors (23489908268968).

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

21354462062660 is a wasteful number, since it uses less digits than its factorization.

21354462062660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067723103142 (or 1067723103140 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 47.

The spelling of 21354462062660 in words is "twenty-one trillion, three hundred fifty-four billion, four hundred sixty-two million, sixty-two thousand, six hundred sixty".