21234204010 has 16 divisors (see below), whose sum is σ = 38224649736. Its totient is φ = 8492996608.

The previous prime is 21234204007. The next prime is 21234204077. The reversal of 21234204010 is 1040243212.

It can be written as a sum of positive squares in 4 ways, for example, as 21100177081 + 134026929 = 145259^2 + 11577^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55674 + ... + 213466.

Almost surely, 2^21234204010 is an apocalyptic number.

21234204010 is a deficient number, since it is larger than the sum of its proper divisors (16990445726).

21234204010 is a wasteful number, since it uses less digits than its factorization.

21234204010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171257.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 21234204010 its reverse (1040243212), we get a palindrome (22274447222).

The spelling of 21234204010 in words is "twenty-one billion, two hundred thirty-four million, two hundred four thousand, ten".