20750007 has 16 divisors (see below), whose sum is σ = 28651392. Its totient is φ = 13347360.

The previous prime is 20749997. The next prime is 20750011. The reversal of 20750007 is 70005702.

It is not a de Polignac number, because 20750007 - 2⁷ = 20749879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20750017) 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, 13828 + ... + 15254.

It is an arithmetic number, because the mean of its divisors is an integer number (1790712).

Almost surely, 2^20750007 is an apocalyptic number.

20750007 is a deficient number, since it is larger than the sum of its proper divisors (7901385).

20750007 is a wasteful number, since it uses less digits than its factorization.

20750007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598.

The product of its (nonzero) digits is 490, while the sum is 21.

The square root of 20750007 is about 4555.2175579219. The cubic root of 20750007 is about 274.7932639052.

Adding to 20750007 its reverse (70005702), we get a palindrome (90755709).

The spelling of 20750007 in words is "twenty million, seven hundred fifty thousand, seven".