21351464410 has 8 divisors (see below), whose sum is σ = 38432635956. Its totient is φ = 8540585760.

The previous prime is 21351464383. The next prime is 21351464429. The reversal of 21351464410 is 1446415312.

It can be written as a sum of positive squares in 2 ways, for example, as 19819289961 + 1532174449 = 140781^2 + 39143^2 .

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, 1067573211 + ... + 1067573230.

Almost surely, 2^21351464410 is an apocalyptic number.

21351464410 is a deficient number, since it is larger than the sum of its proper divisors (17081171546).

21351464410 is a wasteful number, since it uses less digits than its factorization.

21351464410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135146448.

The product of its (nonzero) digits is 11520, while the sum is 31.

Adding to 21351464410 its reverse (1446415312), we get a palindrome (22797879722).

The spelling of 21351464410 in words is "twenty-one billion, three hundred fifty-one million, four hundred sixty-four thousand, four hundred ten".