11417453821 has 16 divisors (see below), whose sum is σ = 12111092784. Its totient is φ = 10749832704.

The previous prime is 11417453819. The next prime is 11417453863. The reversal of 11417453821 is 12835471411.

It can be written as a sum of positive squares in 8 ways, for example, as 2242496025 + 9174957796 = 47355^2 + 95786^2 .

It is a cyclic number.

It is not a de Polignac number, because 11417453821 - 2¹ = 11417453819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11417453881) 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, 103275 + ... + 183031.

It is an arithmetic number, because the mean of its divisors is an integer number (756943299).

Almost surely, 2^11417453821 is an apocalyptic number.

It is an amenable number.

11417453821 is a deficient number, since it is larger than the sum of its proper divisors (693638963).

11417453821 is an equidigital number, since it uses as much as digits as its factorization.

11417453821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79920.

The product of its digits is 26880, while the sum is 37.

The spelling of 11417453821 in words is "eleven billion, four hundred seventeen million, four hundred fifty-three thousand, eight hundred twenty-one".