21442032402153 has 16 divisors (see below), whose sum is σ = 31188970420416. Its totient is φ = 12994937963840.

The previous prime is 21442032402151. The next prime is 21442032402209. The reversal of 21442032402153 is 35120423024412.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21442032402153 - 2¹ = 21442032402151 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (21442032402151) 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, 3953826 + ... + 7649627.

It is an arithmetic number, because the mean of its divisors is an integer number (1949310651276).

Almost surely, 2^{21442032402153} is an apocalyptic number.

It is an amenable number.

21442032402153 is a deficient number, since it is larger than the sum of its proper divisors (9746938018263).

21442032402153 is a wasteful number, since it uses less digits than its factorization.

21442032402153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11659464.

The product of its (nonzero) digits is 46080, while the sum is 33.

Adding to 21442032402153 its reverse (35120423024412), we get a palindrome (56562455426565).

The spelling of 21442032402153 in words is "twenty-one trillion, four hundred forty-two billion, thirty-two million, four hundred two thousand, one hundred fifty-three".