21043600054 has 8 divisors (see below), whose sum is σ = 31618631880. Its totient is φ = 10504056096.

The previous prime is 21043600031. The next prime is 21043600129. The reversal of 21043600054 is 45000634012.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8870484 + ... + 8872855.

It is an arithmetic number, because the mean of its divisors is an integer number (3952328985).

Almost surely, 2^21043600054 is an apocalyptic number.

21043600054 is a deficient number, since it is larger than the sum of its proper divisors (10575031826).

21043600054 is a wasteful number, since it uses less digits than its factorization.

21043600054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17743934.

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 21043600054 in words is "twenty-one billion, forty-three million, six hundred thousand, fifty-four".