21107471054 has 4 divisors (see below), whose sum is σ = 31661206584. Its totient is φ = 10553735526.

The previous prime is 21107471003. The next prime is 21107471069. The reversal of 21107471054 is 45017470112.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21107471054.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5276867762 + ... + 5276867765.

It is an arithmetic number, because the mean of its divisors is an integer number (7915301646).

Almost surely, 2^21107471054 is an apocalyptic number.

21107471054 is a deficient number, since it is larger than the sum of its proper divisors (10553735530).

21107471054 is a wasteful number, since it uses less digits than its factorization.

21107471054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10553735529.

The product of its (nonzero) digits is 7840, while the sum is 32.

The spelling of 21107471054 in words is "twenty-one billion, one hundred seven million, four hundred seventy-one thousand, fifty-four".