21434402422 has 4 divisors (see below), whose sum is σ = 32151603636. Its totient is φ = 10717201210.

The previous prime is 21434402413. The next prime is 21434402497. The reversal of 21434402422 is 22420443412.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5358600604 + ... + 5358600607.

It is an arithmetic number, because the mean of its divisors is an integer number (8037900909).

Almost surely, 2^21434402422 is an apocalyptic number.

21434402422 is a deficient number, since it is larger than the sum of its proper divisors (10717201214).

21434402422 is a wasteful number, since it uses less digits than its factorization.

21434402422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10717201213.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 21434402422 its reverse (22420443412), we get a palindrome (43854845834).

The spelling of 21434402422 in words is "twenty-one billion, four hundred thirty-four million, four hundred two thousand, four hundred twenty-two".