21160434360 has 128 divisors (see below), whose sum is σ = 68471242560. Its totient is φ = 5200588800.

The previous prime is 21160434319. The next prime is 21160434389. The reversal of 21160434360 is 6343406112.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 1020900 + ... + 1041420.

Almost surely, 2^21160434360 is an apocalyptic number.

21160434360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21160434360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34235621280).

21160434360 is an abundant number, since it is smaller than the sum of its proper divisors (47310808200).

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

21160434360 is a wasteful number, since it uses less digits than its factorization.

21160434360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21209 (or 21205 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 21160434360 in words is "twenty-one billion, one hundred sixty million, four hundred thirty-four thousand, three hundred sixty".