21432422153 has 2 divisors, whose sum is σ = 21432422154. Its totient is φ = 21432422152.

The previous prime is 21432422117. The next prime is 21432422197. The reversal of 21432422153 is 35122423412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21401641849 + 30780304 = 146293^2 + 5548^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432422153 - 2³² = 17137454857 is a prime.

It is not a weakly prime, because it can be changed into another prime (21432422113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716211076 + 10716211077.

It is an arithmetic number, because the mean of its divisors is an integer number (10716211077).

Almost surely, 2^21432422153 is an apocalyptic number.

It is an amenable number.

21432422153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432422153 is an equidigital number, since it uses as much as digits as its factorization.

21432422153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

Adding to 21432422153 its reverse (35122423412), we get a palindrome (56554845565).

The spelling of 21432422153 in words is "twenty-one billion, four hundred thirty-two million, four hundred twenty-two thousand, one hundred fifty-three".