21433312410 has 16 divisors (see below), whose sum is σ = 51439949856. Its totient is φ = 5715549968.

The previous prime is 21433312399. The next prime is 21433312477. The reversal of 21433312410 is 1421333412.

It is a happy number.

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, 357221844 + ... + 357221903.

It is an arithmetic number, because the mean of its divisors is an integer number (3214996866).

Almost surely, 2^21433312410 is an apocalyptic number.

21433312410 is an abundant number, since it is smaller than the sum of its proper divisors (30006637446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21433312410 is a wasteful number, since it uses less digits than its factorization.

21433312410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714443757.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 21433312410 its reverse (1421333412), we get a palindrome (22854645822).

The spelling of 21433312410 in words is "twenty-one billion, four hundred thirty-three million, three hundred twelve thousand, four hundred ten".