20679407 has 8 divisors (see below), whose sum is σ = 24448800. Its totient is φ = 17113824.

The previous prime is 20679401. The next prime is 20679409. The reversal of 20679407 is 70497602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20679407 - 2⁶ = 20679343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20679401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50732 + ... + 51137.

It is an arithmetic number, because the mean of its divisors is an integer number (3056100).

Almost surely, 2^20679407 is an apocalyptic number.

20679407 is a deficient number, since it is larger than the sum of its proper divisors (3769393).

20679407 is a wasteful number, since it uses less digits than its factorization.

20679407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101905.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20679407 is about 4547.4615996180. The cubic root of 20679407 is about 274.4812568005.

The spelling of 20679407 in words is "twenty million, six hundred seventy-nine thousand, four hundred seven".