21700270417 has 16 divisors (see below), whose sum is σ = 25029640192. Its totient is φ = 18428634000.

The previous prime is 21700270409. The next prime is 21700270421. The reversal of 21700270417 is 71407200712.

It is not a de Polignac number, because 21700270417 - 2³ = 21700270409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21700270217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 651388 + ... + 683890.

It is an arithmetic number, because the mean of its divisors is an integer number (1564352512).

Almost surely, 2^21700270417 is an apocalyptic number.

It is an amenable number.

21700270417 is a deficient number, since it is larger than the sum of its proper divisors (3329369775).

21700270417 is a wasteful number, since it uses less digits than its factorization.

21700270417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33388.

The product of its (nonzero) digits is 5488, while the sum is 31.

The spelling of 21700270417 in words is "twenty-one billion, seven hundred million, two hundred seventy thousand, four hundred seventeen".