20670470 has 16 divisors (see below), whose sum is σ = 39395808. Its totient is φ = 7781760.

The previous prime is 20670467. The next prime is 20670479. The reversal of 20670470 is 7407602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20670479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60626 + ... + 60965.

It is an arithmetic number, because the mean of its divisors is an integer number (2462238).

Almost surely, 2^20670470 is an apocalyptic number.

20670470 is a deficient number, since it is larger than the sum of its proper divisors (18725338).

20670470 is a wasteful number, since it uses less digits than its factorization.

20670470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121615.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 20670470 is about 4546.4788573136. The cubic root of 20670470 is about 274.4417103336.

The spelling of 20670470 in words is "twenty million, six hundred seventy thousand, four hundred seventy".