21160534454436 has 72 divisors (see below), whose sum is σ = 53467016532384. Its totient is φ = 6510661597440.

The previous prime is 21160534454431. The next prime is 21160534454441. The reversal of 21160534454436 is 63445443506112.

It is an interprime number because it is at equal distance from previous prime (21160534454431) and next prime (21160534454441).

It is a super-3 number, since 3×21160534454436³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21160534454431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51328200 + ... + 51738816.

Almost surely, 2^{21160534454436} is an apocalyptic number.

21160534454436 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21160534454436 is an abundant number, since it is smaller than the sum of its proper divisors (32306482077948).

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

21160534454436 is a wasteful number, since it uses less digits than its factorization.

21160534454436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436061 (or 436046 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 48.

The spelling of 21160534454436 in words is "twenty-one trillion, one hundred sixty billion, five hundred thirty-four million, four hundred fifty-four thousand, four hundred thirty-six".