21455367090367 has 4 divisors (see below), whose sum is σ = 24520419531856. Its totient is φ = 18390314648880.

The previous prime is 21455367090341. The next prime is 21455367090457. The reversal of 21455367090367 is 76309076355412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21455367090367 - 2¹⁵ = 21455367057599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21455367090767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1532526220734 + ... + 1532526220747.

It is an arithmetic number, because the mean of its divisors is an integer number (6130104882964).

Almost surely, 2^{21455367090367} is an apocalyptic number.

21455367090367 is a deficient number, since it is larger than the sum of its proper divisors (3065052441489).

21455367090367 is an equidigital number, since it uses as much as digits as its factorization.

21455367090367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065052441488.

The product of its (nonzero) digits is 28576800, while the sum is 58.

The spelling of 21455367090367 in words is "twenty-one trillion, four hundred fifty-five billion, three hundred sixty-seven million, ninety thousand, three hundred sixty-seven".