20702470 has 16 divisors (see below), whose sum is σ = 37372608. Its totient is φ = 8256960.

The previous prime is 20702459. The next prime is 20702471. The reversal of 20702470 is 7420702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (2335788).

Almost surely, 2^20702470 is an apocalyptic number.

20702470 is a deficient number, since it is larger than the sum of its proper divisors (16670138).

20702470 is a wasteful number, since it uses less digits than its factorization.

20702470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6015.

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 20702470 is about 4549.9967032955. The cubic root of 20702470 is about 274.5832585865.

The spelling of 20702470 in words is "twenty million, seven hundred two thousand, four hundred seventy".