21162706834 has 8 divisors (see below), whose sum is σ = 31744700208. Its totient is φ = 10581140100.

The previous prime is 21162706777. The next prime is 21162706837. The reversal of 21162706834 is 43860726112.

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

It is not an unprimeable number, because it can be changed into a prime (21162706837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89509 + ... + 224359.

It is an arithmetic number, because the mean of its divisors is an integer number (3968087526).

Almost surely, 2^21162706834 is an apocalyptic number.

21162706834 is a deficient number, since it is larger than the sum of its proper divisors (10581993374).

21162706834 is a wasteful number, since it uses less digits than its factorization.

21162706834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213320.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 21162706834 in words is "twenty-one billion, one hundred sixty-two million, seven hundred six thousand, eight hundred thirty-four".