21475701273 has 16 divisors (see below), whose sum is σ = 32459900480. Its totient is φ = 12520246464.

The previous prime is 21475701229. The next prime is 21475701277. The reversal of 21475701273 is 37210757412.

It is not a de Polignac number, because 21475701273 - 2⁹ = 21475700761 is a prime.

It is a super-2 number, since 2×21475701273² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21475701277) 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 15 ways as a sum of consecutive naturals, for example, 14490286 + ... + 14491767.

It is an arithmetic number, because the mean of its divisors is an integer number (2028743780).

Almost surely, 2^21475701273 is an apocalyptic number.

It is an amenable number.

21475701273 is a deficient number, since it is larger than the sum of its proper divisors (10984199207).

21475701273 is a wasteful number, since it uses less digits than its factorization.

21475701273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28982088.

The product of its (nonzero) digits is 82320, while the sum is 39.

The spelling of 21475701273 in words is "twenty-one billion, four hundred seventy-five million, seven hundred one thousand, two hundred seventy-three".