20442153 has 16 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 13201344.

The previous prime is 20442151. The next prime is 20442173. The reversal of 20442153 is 35124402.

It is not a de Polignac number, because 20442153 - 2¹ = 20442151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20442151) 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, 12423 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (1757700).

Almost surely, 2^20442153 is an apocalyptic number.

It is an amenable number.

20442153 is a deficient number, since it is larger than the sum of its proper divisors (7681047).

20442153 is a wasteful number, since it uses less digits than its factorization.

20442153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 20442153 is about 4521.2999236945. The cubic root of 20442153 is about 273.4275124929.

Adding to 20442153 its reverse (35124402), we get a palindrome (55566555).

The spelling of 20442153 in words is "twenty million, four hundred forty-two thousand, one hundred fifty-three".