21356254022702 has 16 divisors (see below), whose sum is σ = 32239038202272. Its totient is φ = 10609910556960.

The previous prime is 21356254022641. The next prime is 21356254022707. The reversal of 21356254022702 is 20722045265312.

It is a self number, because there is not a number n which added to its sum of digits gives 21356254022702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21356254022707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16515383 + ... + 17761485.

It is an arithmetic number, because the mean of its divisors is an integer number (2014939887642).

Almost surely, 2^{21356254022702} is an apocalyptic number.

21356254022702 is a deficient number, since it is larger than the sum of its proper divisors (10882784179570).

21356254022702 is a wasteful number, since it uses less digits than its factorization.

21356254022702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300843.

The product of its (nonzero) digits is 403200, while the sum is 41.

The spelling of 21356254022702 in words is "twenty-one trillion, three hundred fifty-six billion, two hundred fifty-four million, twenty-two thousand, seven hundred two".