21254582371 has 8 divisors (see below), whose sum is σ = 24194939904. Its totient is φ = 18482245320.

The previous prime is 21254582353. The next prime is 21254582387. The reversal of 21254582371 is 17328545212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21254582371 - 2²⁹ = 20717711459 is a prime.

It is a super-3 number, since 3×21254582371³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21254582311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42004851 + ... + 42005356.

It is an arithmetic number, because the mean of its divisors is an integer number (3024367488).

Almost surely, 2^21254582371 is an apocalyptic number.

21254582371 is a deficient number, since it is larger than the sum of its proper divisors (2940357533).

21254582371 is a wasteful number, since it uses less digits than its factorization.

21254582371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84010241.

The product of its digits is 134400, while the sum is 40.

The spelling of 21254582371 in words is "twenty-one billion, two hundred fifty-four million, five hundred eighty-two thousand, three hundred seventy-one".