21060540368 has 20 divisors (see below), whose sum is σ = 46634053920. Its totient is φ = 9025945824.

The previous prime is 21060540337. The next prime is 21060540377. The reversal of 21060540368 is 86304506012.

It is a congruent number.

It is an unprimeable number.

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, 94020158 + ... + 94020381.

It is an arithmetic number, because the mean of its divisors is an integer number (2331702696).

Almost surely, 2^21060540368 is an apocalyptic number.

21060540368 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21060540368 is an abundant number, since it is smaller than the sum of its proper divisors (25573513552).

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

21060540368 is a wasteful number, since it uses less digits than its factorization.

21060540368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188040554 (or 188040548 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 21060540368 in words is "twenty-one billion, sixty million, five hundred forty thousand, three hundred sixty-eight".