21035351410 has 16 divisors (see below), whose sum is σ = 38104805016. Its totient is φ = 8360546688.

The previous prime is 21035351399. The next prime is 21035351461. The reversal of 21035351410 is 1415353012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14976130129 + 6059221281 = 122377^2 + 77841^2 .

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, 6697587 + ... + 6700726.

Almost surely, 2^21035351410 is an apocalyptic number.

21035351410 is a deficient number, since it is larger than the sum of its proper divisors (17069453606).

21035351410 is a wasteful number, since it uses less digits than its factorization.

21035351410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13398477.

The product of its (nonzero) digits is 1800, while the sum is 25.

The spelling of 21035351410 in words is "twenty-one billion, thirty-five million, three hundred fifty-one thousand, four hundred ten".