21475873483 has 4 divisors (see below), whose sum is σ = 21540755608. Its totient is φ = 21410991360.

The previous prime is 21475873477. The next prime is 21475873541. The reversal of 21475873483 is 38437857412.

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 21475873483 - 2²⁵ = 21442319051 is a prime.

It is a super-2 number, since 2×21475873483² (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 21475873483.

It is not an unprimeable number, because it can be changed into a prime (21475873453) 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, 32440566 + ... + 32441227.

It is an arithmetic number, because the mean of its divisors is an integer number (5385188902).

Almost surely, 2^21475873483 is an apocalyptic number.

21475873483 is a deficient number, since it is larger than the sum of its proper divisors (64882125).

21475873483 is an equidigital number, since it uses as much as digits as its factorization.

21475873483 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64882124.

The product of its digits is 4515840, while the sum is 52.

The spelling of 21475873483 in words is "twenty-one billion, four hundred seventy-five million, eight hundred seventy-three thousand, four hundred eighty-three".