21043534110 has 32 divisors (see below), whose sum is σ = 50642122752. Its totient is φ = 5596315680.

The previous prime is 21043534091. The next prime is 21043534121. The reversal of 21043534110 is 1143534012.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 944646 + ... + 966665.

It is an arithmetic number, because the mean of its divisors is an integer number (1582566336).

Almost surely, 2^21043534110 is an apocalyptic number.

21043534110 is an abundant number, since it is smaller than the sum of its proper divisors (29598588642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21043534110 is a wasteful number, since it uses less digits than its factorization.

21043534110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911688.

The product of its (nonzero) digits is 1440, while the sum is 24.

The spelling of 21043534110 in words is "twenty-one billion, forty-three million, five hundred thirty-four thousand, one hundred ten".