21114513506 has 8 divisors (see below), whose sum is σ = 31811294160. Its totient is φ = 10510748788.

The previous prime is 21114513461. The next prime is 21114513527. The reversal of 21114513506 is 60531541112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 23253416 + ... + 23254323.

It is an arithmetic number, because the mean of its divisors is an integer number (3976411770).

Almost surely, 2^21114513506 is an apocalyptic number.

21114513506 is a deficient number, since it is larger than the sum of its proper divisors (10696780654).

21114513506 is a wasteful number, since it uses less digits than its factorization.

21114513506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46507968.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 21114513506 in words is "twenty-one billion, one hundred fourteen million, five hundred thirteen thousand, five hundred six".