21442210153 has 16 divisors (see below), whose sum is σ = 27300430080. Its totient is φ = 16380254016.

The previous prime is 21442210117. The next prime is 21442210187. The reversal of 21442210153 is 35101224412.

It is not a de Polignac number, because 21442210153 - 2¹⁷ = 21442079081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21442210553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4059925 + ... + 4065202.

It is an arithmetic number, because the mean of its divisors is an integer number (1706276880).

Almost surely, 2^21442210153 is an apocalyptic number.

It is an amenable number.

21442210153 is a deficient number, since it is larger than the sum of its proper divisors (5858219927).

21442210153 is a wasteful number, since it uses less digits than its factorization.

21442210153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8125176.

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 21442210153 its reverse (35101224412), we get a palindrome (56543434565).

The spelling of 21442210153 in words is "twenty-one billion, four hundred forty-two million, two hundred ten thousand, one hundred fifty-three".