21386189054 has 8 divisors (see below), whose sum is σ = 32083594128. Its totient is φ = 10691657680.

The previous prime is 21386189029. The next prime is 21386189063. The reversal of 21386189054 is 45098168312.

It is a happy number.

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

It is a Curzon number.

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, 699722 + ... + 729645.

It is an arithmetic number, because the mean of its divisors is an integer number (4010449266).

Almost surely, 2^21386189054 is an apocalyptic number.

21386189054 is a deficient number, since it is larger than the sum of its proper divisors (10697405074).

21386189054 is a wasteful number, since it uses less digits than its factorization.

21386189054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436850.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 21386189054 in words is "twenty-one billion, three hundred eighty-six million, one hundred eighty-nine thousand, fifty-four".