20657067 has 16 divisors (see below), whose sum is σ = 28554240. Its totient is φ = 13269600.

The previous prime is 20657053. The next prime is 20657069. The reversal of 20657067 is 76075602.

It is not a de Polignac number, because 20657067 - 2⁴ = 20657051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20657069) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35892 + ... + 36462.

It is an arithmetic number, because the mean of its divisors is an integer number (1784640).

Almost surely, 2^20657067 is an apocalyptic number.

20657067 is a deficient number, since it is larger than the sum of its proper divisors (7897173).

20657067 is a wasteful number, since it uses less digits than its factorization.

20657067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 20657067 is about 4545.0046204597. The cubic root of 20657067 is about 274.3823803239.

The spelling of 20657067 in words is "twenty million, six hundred fifty-seven thousand, sixty-seven".