21355346663514 has 24 divisors (see below), whose sum is σ = 46277151085620. Its totient is φ = 7117336070208.

The previous prime is 21355346663489. The next prime is 21355346663557. The reversal of 21355346663514 is 41536664355312.

It can be written as a sum of positive squares in 2 ways, for example, as 21048688773225 + 306657890289 = 4587885^2 + 553767^2 .

It is a super-2 number, since 2×21355346663514² (a number of 27 digits) contains 22 as substring.

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, 92616459 + ... + 92846750.

Almost surely, 2^{21355346663514} is an apocalyptic number.

21355346663514 is an abundant number, since it is smaller than the sum of its proper divisors (24921804422106).

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

21355346663514 is a wasteful number, since it uses less digits than its factorization.

21355346663514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185469614 (or 185469611 counting only the distinct ones).

The product of its digits is 23328000, while the sum is 54.

The spelling of 21355346663514 in words is "twenty-one trillion, three hundred fifty-five billion, three hundred forty-six million, six hundred sixty-three thousand, five hundred fourteen".