21214036536450 has 48 divisors (see below), whose sum is σ = 52914919406976. Its totient is φ = 5624376539200.

The previous prime is 21214036536449. The next prime is 21214036536487. The reversal of 21214036536450 is 5463563041212.

It is a super-3 number, since 3×21214036536450³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 408722346 + ... + 408774245.

It is an arithmetic number, because the mean of its divisors is an integer number (1102394154312).

Almost surely, 2^{21214036536450} is an apocalyptic number.

21214036536450 is an abundant number, since it is smaller than the sum of its proper divisors (31700882870526).

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

21214036536450 is a wasteful number, since it uses less digits than its factorization.

21214036536450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817496779 (or 817496774 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 42.

Adding to 21214036536450 its reverse (5463563041212), we get a palindrome (26677599577662).

The spelling of 21214036536450 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, four hundred fifty".