21214036536654 has 128 divisors (see below), whose sum is σ = 46413015828480. Its totient is φ = 6425075644416.

The previous prime is 21214036536617. The next prime is 21214036536677. The reversal of 21214036536654 is 45663563041212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1788246327 + ... + 1788258189.

It is an arithmetic number, because the mean of its divisors is an integer number (362601686160).

Almost surely, 2^{21214036536654} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21214036536654, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23206507914240).

21214036536654 is an abundant number, since it is smaller than the sum of its proper divisors (25198979291826).

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

21214036536654 is a wasteful number, since it uses less digits than its factorization.

21214036536654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13106.

The product of its (nonzero) digits is 3110400, while the sum is 48.

Adding to 21214036536654 its reverse (45663563041212), we get a palindrome (66877599577866).

The spelling of 21214036536654 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thirty-six thousand, six hundred fifty-four".