21365041704140 has 48 divisors (see below), whose sum is σ = 46556616395520. Its totient is φ = 8229704871360.

The previous prime is 21365041704131. The next prime is 21365041704161. The reversal of 21365041704140 is 4140714056312.

It is a junction number, because it is equal to n+sod(n) for n = 21365041704094 and 21365041704103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174890150 + ... + 175012269.

It is an arithmetic number, because the mean of its divisors is an integer number (969929508240).

Almost surely, 2^{21365041704140} is an apocalyptic number.

21365041704140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21365041704140 is an abundant number, since it is smaller than the sum of its proper divisors (25191574691380).

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

21365041704140 is a wasteful number, since it uses less digits than its factorization.

21365041704140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349902542 (or 349902540 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The spelling of 21365041704140 in words is "twenty-one trillion, three hundred sixty-five billion, forty-one million, seven hundred four thousand, one hundred forty".