21434301442 has 32 divisors (see below), whose sum is σ = 32689163520. Its totient is φ = 10539668160.

The previous prime is 21434301419. The next prime is 21434301463. The reversal of 21434301442 is 24410343412.

It is a self number, because there is not a number n which added to its sum of digits gives 21434301442.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33968467 + ... + 33969097.

It is an arithmetic number, because the mean of its divisors is an integer number (1021536360).

Almost surely, 2^21434301442 is an apocalyptic number.

21434301442 is a deficient number, since it is larger than the sum of its proper divisors (11254862078).

21434301442 is a wasteful number, since it uses less digits than its factorization.

21434301442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1618.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21434301442 its reverse (24410343412), we get a palindrome (45844644854).

The spelling of 21434301442 in words is "twenty-one billion, four hundred thirty-four million, three hundred one thousand, four hundred forty-two".