21422410346 has 4 divisors (see below), whose sum is σ = 32133615522. Its totient is φ = 10711205172.

The previous prime is 21422410337. The next prime is 21422410351. The reversal of 21422410346 is 64301422412.

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

It can be written as a sum of positive squares in only one way, i.e., 21021810121 + 400600225 = 144989^2 + 20015^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5355602585 + ... + 5355602588.

Almost surely, 2^21422410346 is an apocalyptic number.

21422410346 is a deficient number, since it is larger than the sum of its proper divisors (10711205176).

21422410346 is a wasteful number, since it uses less digits than its factorization.

21422410346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10711205175.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 21422410346 its reverse (64301422412), we get a palindrome (85723832758).

The spelling of 21422410346 in words is "twenty-one billion, four hundred twenty-two million, four hundred ten thousand, three hundred forty-six".