21365361647054 has 16 divisors (see below), whose sum is σ = 33747478275600. Its totient is φ = 10116625446144.

The previous prime is 21365361647039. The next prime is 21365361647093. The reversal of 21365361647054 is 45074616356312.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21365361646987 and 21365361647005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105703769 + ... + 105905700.

It is an arithmetic number, because the mean of its divisors is an integer number (2109217392225).

Almost surely, 2^{21365361647054} is an apocalyptic number.

21365361647054 is a deficient number, since it is larger than the sum of its proper divisors (12382116628546).

21365361647054 is a wasteful number, since it uses less digits than its factorization.

21365361647054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211612147.

The product of its (nonzero) digits is 10886400, while the sum is 53.

The spelling of 21365361647054 in words is "twenty-one trillion, three hundred sixty-five billion, three hundred sixty-one million, six hundred forty-seven thousand, fifty-four".