20858007 has 16 divisors (see below), whose sum is σ = 28310240. Its totient is φ = 13658112.

The previous prime is 20858003. The next prime is 20858011. The reversal of 20858007 is 70085802.

It is an interprime number because it is at equal distance from previous prime (20858003) and next prime (20858011).

It is not a de Polignac number, because 20858007 - 2² = 20858003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20858003) 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 15 ways as a sum of consecutive naturals, for example, 66483 + ... + 66795.

It is an arithmetic number, because the mean of its divisors is an integer number (1769390).

Almost surely, 2^20858007 is an apocalyptic number.

20858007 is a deficient number, since it is larger than the sum of its proper divisors (7452233).

20858007 is a wasteful number, since it uses less digits than its factorization.

20858007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642.

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 20858007 is about 4567.0567108369. The cubic root of 20858007 is about 275.2691887553.

The spelling of 20858007 in words is "twenty million, eight hundred fifty-eight thousand, seven".