21152852834 has 4 divisors (see below), whose sum is σ = 31729279254. Its totient is φ = 10576426416.

The previous prime is 21152852827. The next prime is 21152852863. The reversal of 21152852834 is 43825825112.

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

It can be written as a sum of positive squares in only one way, i.e., 17122507609 + 4030345225 = 130853^2 + 63485^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21152852791 and 21152852800.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5288213207 + ... + 5288213210.

Almost surely, 2^21152852834 is an apocalyptic number.

21152852834 is a deficient number, since it is larger than the sum of its proper divisors (10576426420).

21152852834 is a wasteful number, since it uses less digits than its factorization.

21152852834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10576426419.

The product of its digits is 153600, while the sum is 41.

The spelling of 21152852834 in words is "twenty-one billion, one hundred fifty-two million, eight hundred fifty-two thousand, eight hundred thirty-four".