21434330402 has 8 divisors (see below), whose sum is σ = 32558476800. Its totient is φ = 10581504804.

The previous prime is 21434330383. The next prime is 21434330417. The reversal of 21434330402 is 20403343412.

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, 67830002 + ... + 67830317.

It is an arithmetic number, because the mean of its divisors is an integer number (4069809600).

Almost surely, 2^21434330402 is an apocalyptic number.

21434330402 is a deficient number, since it is larger than the sum of its proper divisors (11124146398).

21434330402 is a wasteful number, since it uses less digits than its factorization.

21434330402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135660400.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 21434330402 its reverse (20403343412), we get a palindrome (41837673814).

The spelling of 21434330402 in words is "twenty-one billion, four hundred thirty-four million, three hundred thirty thousand, four hundred two".