21422152027 has 4 divisors (see below), whose sum is σ = 21423528000. Its totient is φ = 21420776056.

The previous prime is 21422152019. The next prime is 21422152051. The reversal of 21422152027 is 72025122412.

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

It is a cyclic number.

It is not a de Polignac number, because 21422152027 - 2³ = 21422152019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21422151986 and 21422152004.

It is not an unprimeable number, because it can be changed into a prime (21422152007) 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, 664363 + ... + 695860.

It is an arithmetic number, because the mean of its divisors is an integer number (5355882000).

Almost surely, 2^21422152027 is an apocalyptic number.

21422152027 is a deficient number, since it is larger than the sum of its proper divisors (1375973).

21422152027 is a wasteful number, since it uses less digits than its factorization.

21422152027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375972.

The product of its (nonzero) digits is 4480, while the sum is 28.

Adding to 21422152027 its reverse (72025122412), we get a palindrome (93447274439).

The spelling of 21422152027 in words is "twenty-one billion, four hundred twenty-two million, one hundred fifty-two thousand, twenty-seven".