21278361537022 has 8 divisors (see below), whose sum is σ = 31970124749376. Its totient is φ = 10621653287232.

The previous prime is 21278361536981. The next prime is 21278361537031. The reversal of 21278361537022 is 22073516387212.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 8763739123 + ... + 8763741550.

It is an arithmetic number, because the mean of its divisors is an integer number (3996265593672).

Almost surely, 2^{21278361537022} is an apocalyptic number.

21278361537022 is a deficient number, since it is larger than the sum of its proper divisors (10691763212354).

21278361537022 is a wasteful number, since it uses less digits than its factorization.

21278361537022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17527481282.

The product of its (nonzero) digits is 1693440, while the sum is 49.

The spelling of 21278361537022 in words is "twenty-one trillion, two hundred seventy-eight billion, three hundred sixty-one million, five hundred thirty-seven thousand, twenty-two".