21055100054 has 8 divisors (see below), whose sum is σ = 31583797128. Its totient is φ = 10527167680.

The previous prime is 21055100029. The next prime is 21055100063. The reversal of 21055100054 is 45000155012.

It is a happy number.

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, 116507 + ... + 235974.

It is an arithmetic number, because the mean of its divisors is an integer number (3947974641).

Almost surely, 2^21055100054 is an apocalyptic number.

21055100054 is a deficient number, since it is larger than the sum of its proper divisors (10528697074).

21055100054 is a wasteful number, since it uses less digits than its factorization.

21055100054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382350.

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 21055100054 its reverse (45000155012), we get a palindrome (66055255066).

The spelling of 21055100054 in words is "twenty-one billion, fifty-five million, one hundred thousand, fifty-four".