20657006 has 16 divisors (see below), whose sum is σ = 32892480. Its totient is φ = 9696000.

The previous prime is 20656991. The next prime is 20657027. The reversal of 20657006 is 60075602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25130 + ... + 25938.

It is an arithmetic number, because the mean of its divisors is an integer number (2055780).

Almost surely, 2^20657006 is an apocalyptic number.

20657006 is a deficient number, since it is larger than the sum of its proper divisors (12235474).

20657006 is a wasteful number, since it uses less digits than its factorization.

20657006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 20657006 is about 4544.9979097905. The cubic root of 20657006 is about 274.3821102413.

The spelling of 20657006 in words is "twenty million, six hundred fifty-seven thousand, six".