21422315938 has 8 divisors (see below), whose sum is σ = 32451627420. Its totient is φ = 10605106800.

The previous prime is 21422315933. The next prime is 21422315939. The reversal of 21422315938 is 83951322412.

It can be written as a sum of positive squares in 2 ways, for example, as 20837788609 + 584527329 = 144353^2 + 24177^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21422315938.

It is not an unprimeable number, because it can be changed into a prime (21422315933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53025333 + ... + 53025736.

Almost surely, 2^21422315938 is an apocalyptic number.

21422315938 is a deficient number, since it is larger than the sum of its proper divisors (11029311482).

21422315938 is a wasteful number, since it uses less digits than its factorization.

21422315938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106051172.

The product of its digits is 103680, while the sum is 40.

The spelling of 21422315938 in words is "twenty-one billion, four hundred twenty-two million, three hundred fifteen thousand, nine hundred thirty-eight".