21477140999 has 4 divisors (see below), whose sum is σ = 21718457280. Its totient is φ = 21235824720.

The previous prime is 21477140983. The next prime is 21477141013. The reversal of 21477140999 is 99904177412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21477140999 - 2⁴ = 21477140983 is a prime.

It is a super-2 number, since 2×21477140999² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21477140999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477140929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120658007 + ... + 120658184.

It is an arithmetic number, because the mean of its divisors is an integer number (5429614320).

Almost surely, 2^21477140999 is an apocalyptic number.

21477140999 is a deficient number, since it is larger than the sum of its proper divisors (241316281).

21477140999 is an equidigital number, since it uses as much as digits as its factorization.

21477140999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241316280.

The product of its (nonzero) digits is 1143072, while the sum is 53.

The spelling of 21477140999 in words is "twenty-one billion, four hundred seventy-seven million, one hundred forty thousand, nine hundred ninety-nine".