21214035526340 has 24 divisors (see below), whose sum is σ = 44549567827800. Its totient is φ = 8485596453888.

The previous prime is 21214035526337. The next prime is 21214035526373. The reversal of 21214035526340 is 4362553041212.

It can be written as a sum of positive squares in 4 ways, for example, as 9185360701696 + 12028674824644 = 3030736^2 + 3468238^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21214035526294 and 21214035526303.

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 7 ways as a sum of consecutive naturals, for example, 13165364 + ... + 14688596.

It is an arithmetic number, because the mean of its divisors is an integer number (1856231992825).

Almost surely, 2^{21214035526340} is an apocalyptic number.

21214035526340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21214035526340 is an abundant number, since it is smaller than the sum of its proper divisors (23335532301460).

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

21214035526340 is a wasteful number, since it uses less digits than its factorization.

21214035526340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219591 (or 2219589 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 38.

Adding to 21214035526340 its reverse (4362553041212), we get a palindrome (25576588567552).

The spelling of 21214035526340 in words is "twenty-one trillion, two hundred fourteen billion, thirty-five million, five hundred twenty-six thousand, three hundred forty".