21000342010 has 8 divisors (see below), whose sum is σ = 37800615636. Its totient is φ = 8400136800.

The previous prime is 21000341969. The next prime is 21000342023. The reversal of 21000342010 is 1024300012.

It can be written as a sum of positive squares in 2 ways, for example, as 18604141609 + 2396200401 = 136397^2 + 48951^2 .

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

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, 1050017091 + ... + 1050017110.

Almost surely, 2^21000342010 is an apocalyptic number.

21000342010 is a deficient number, since it is larger than the sum of its proper divisors (16800273626).

21000342010 is a wasteful number, since it uses less digits than its factorization.

21000342010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2100034208.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21000342010 its reverse (1024300012), we get a palindrome (22024642022).

The spelling of 21000342010 in words is "twenty-one billion, three hundred forty-two thousand, ten".