21310340410 has 32 divisors (see below), whose sum is σ = 38693138832. Its totient is φ = 8449973760.

The previous prime is 21310340371. The next prime is 21310340411. The reversal of 21310340410 is 1404301312.

It can be written as a sum of positive squares in 8 ways, for example, as 20492208801 + 818131609 = 143151^2 + 28603^2 .

It is not an unprimeable number, because it can be changed into a prime (21310340411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993600 + ... + 1014820.

Almost surely, 2^21310340410 is an apocalyptic number.

21310340410 is a deficient number, since it is larger than the sum of its proper divisors (17382798422).

21310340410 is a wasteful number, since it uses less digits than its factorization.

21310340410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22098.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21310340410 its reverse (1404301312), we get a palindrome (22714641722).

The spelling of 21310340410 in words is "twenty-one billion, three hundred ten million, three hundred forty thousand, four hundred ten".