21405374221410 has 32 divisors (see below), whose sum is σ = 57080997924480. Its totient is φ = 5708099792304.

The previous prime is 21405374221391. The next prime is 21405374221421. The reversal of 21405374221410 is 1412247350412.

21405374221410 is a `hidden beast` number, since 2 + 1 + 40 + 53 + 7 + 422 + 141 + 0 = 666.

It is a Curzon number.

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, 39639581622 + ... + 39639582161.

It is an arithmetic number, because the mean of its divisors is an integer number (1783781185140).

Almost surely, 2^{21405374221410} is an apocalyptic number.

21405374221410 is an abundant number, since it is smaller than the sum of its proper divisors (35675623703070).

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

21405374221410 is a wasteful number, since it uses less digits than its factorization.

21405374221410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79279163799 (or 79279163793 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The spelling of 21405374221410 in words is "twenty-one trillion, four hundred five billion, three hundred seventy-four million, two hundred twenty-one thousand, four hundred ten".