21470666743475 has 24 divisors (see below), whose sum is σ = 28191013146288. Its totient is φ = 16165408896000.

The previous prime is 21470666743451. The next prime is 21470666743483. The reversal of 21470666743475 is 57434766607412.

It is not a de Polignac number, because 21470666743475 - 2¹⁴ = 21470666727091 is a prime.

It is a super-2 number, since 2×21470666743475² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8226167 + ... + 10517183.

It is an arithmetic number, because the mean of its divisors is an integer number (1174625547762).

Almost surely, 2^{21470666743475} is an apocalyptic number.

21470666743475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21470666743475 is a deficient number, since it is larger than the sum of its proper divisors (6720346402813).

21470666743475 is a wasteful number, since it uses less digits than its factorization.

21470666743475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313095 (or 2313090 counting only the distinct ones).

The product of its (nonzero) digits is 142248960, while the sum is 62.

The spelling of 21470666743475 in words is "twenty-one trillion, four hundred seventy billion, six hundred sixty-six million, seven hundred forty-three thousand, four hundred seventy-five".