21027075518 has 8 divisors (see below), whose sum is σ = 31541300112. Its totient is φ = 10513308816.

The previous prime is 21027075473. The next prime is 21027075521. The reversal of 21027075518 is 81557072012.

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, 44471 + ... + 209837.

It is an arithmetic number, because the mean of its divisors is an integer number (3942662514).

Almost surely, 2^21027075518 is an apocalyptic number.

21027075518 is a deficient number, since it is larger than the sum of its proper divisors (10514224594).

21027075518 is a wasteful number, since it uses less digits than its factorization.

21027075518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228946.

The product of its (nonzero) digits is 39200, while the sum is 38.

The spelling of 21027075518 in words is "twenty-one billion, twenty-seven million, seventy-five thousand, five hundred eighteen".