20670417 has 16 divisors (see below), whose sum is σ = 31680000. Its totient is φ = 13304592.

The previous prime is 20670379. The next prime is 20670421. The reversal of 20670417 is 71407602.

It is not a de Polignac number, because 20670417 - 2¹⁰ = 20669393 is a prime.

It is a super-2 number, since 2×20670417² = 854532277907778, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20670427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12417 + ... + 13982.

It is an arithmetic number, because the mean of its divisors is an integer number (1980000).

Almost surely, 2^20670417 is an apocalyptic number.

20670417 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20670417 is a deficient number, since it is larger than the sum of its proper divisors (11009583).

20670417 is a wasteful number, since it uses less digits than its factorization.

20670417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26437 (or 26431 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 20670417 is about 4546.4730286234. The cubic root of 20670417 is about 274.4414757732.

The spelling of 20670417 in words is "twenty million, six hundred seventy thousand, four hundred seventeen".