21470017402475 has 6 divisors (see below), whose sum is σ = 26622821579100. Its totient is φ = 17176013921960.

The previous prime is 21470017402453. The next prime is 21470017402531. The reversal of 21470017402475 is 57420471007412.

It is a happy number.

It is not a de Polignac number, because 21470017402475 - 2²⁴ = 21470000625259 is a prime.

It is a super-2 number, since 2×21470017402475² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 429400348025 + ... + 429400348074.

It is an arithmetic number, because the mean of its divisors is an integer number (4437136929850).

Almost surely, 2^{21470017402475} is an apocalyptic number.

21470017402475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21470017402475 is a deficient number, since it is larger than the sum of its proper divisors (5152804176625).

21470017402475 is an equidigital number, since it uses as much as digits as its factorization.

21470017402475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858800696109 (or 858800696104 counting only the distinct ones).

The product of its (nonzero) digits is 439040, while the sum is 44.

Adding to 21470017402475 its reverse (57420471007412), we get a palindrome (78890488409887).

The spelling of 21470017402475 in words is "twenty-one trillion, four hundred seventy billion, seventeen million, four hundred two thousand, four hundred seventy-five".