19421153 has 4 divisors (see below), whose sum is σ = 19533588. Its totient is φ = 19308720.

The previous prime is 19421147. The next prime is 19421179. The reversal of 19421153 is 35112491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35112491 = 31 ⋅1132661.

It can be written as a sum of positive squares in 2 ways, for example, as 18861649 + 559504 = 4343^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 19421153 - 2⁸ = 19420897 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (19421113) 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, 55958 + ... + 56303.

It is an arithmetic number, because the mean of its divisors is an integer number (4883397).

Almost surely, 2^19421153 is an apocalyptic number.

It is an amenable number.

19421153 is a deficient number, since it is larger than the sum of its proper divisors (112435).

19421153 is a wasteful number, since it uses less digits than its factorization.

19421153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112434.

The product of its digits is 1080, while the sum is 26.

The square root of 19421153 is about 4406.9437255313. The cubic root of 19421153 is about 268.7973626280.

The spelling of 19421153 in words is "nineteen million, four hundred twenty-one thousand, one hundred fifty-three".