21214036536408 has 64 divisors (see below), whose sum is σ = 58928256604800. Its totient is φ = 7071300231840.

The previous prime is 21214036536403. The next prime is 21214036536449. The reversal of 21214036536408 is 80463563041212.

21214036536408 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 40 + 36 + 536 + 40 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21214036536401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62185423 + ... + 62525633.

It is an arithmetic number, because the mean of its divisors is an integer number (920754009450).

Almost surely, 2^{21214036536408} is an apocalyptic number.

It is an amenable number.

21214036536408 is an abundant number, since it is smaller than the sum of its proper divisors (37714220068392).

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

21214036536408 is a wasteful number, since it uses less digits than its factorization.

21214036536408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628909 (or 628899 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 21214036536408 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred eight".