20670712 has 8 divisors (see below), whose sum is σ = 38757600. Its totient is φ = 10335352.

The previous prime is 20670701. The next prime is 20670719. The reversal of 20670712 is 21707602.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1291912 + ... + 1291927.

It is an arithmetic number, because the mean of its divisors is an integer number (4844700).

Almost surely, 2^20670712 is an apocalyptic number.

It is an amenable number.

20670712 is a deficient number, since it is larger than the sum of its proper divisors (18086888).

20670712 is a wasteful number, since it uses less digits than its factorization.

20670712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583845 (or 2583841 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 20670712 is about 4546.5054712383. The cubic root of 20670712 is about 274.4427813403.

The spelling of 20670712 in words is "twenty million, six hundred seventy thousand, seven hundred twelve".