20070775 has 6 divisors (see below), whose sum is σ = 24887792. Its totient is φ = 16056600.

The previous prime is 20070773. The next prime is 20070779. The reversal of 20070775 is 57707002.

It is a happy number.

It is not a de Polignac number, because 20070775 - 2¹ = 20070773 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 (20070773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 401391 + ... + 401440.

Almost surely, 2^20070775 is an apocalyptic number.

20070775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20070775 is a deficient number, since it is larger than the sum of its proper divisors (4817017).

20070775 is an equidigital number, since it uses as much as digits as its factorization.

20070775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 802841 (or 802836 counting only the distinct ones).

The product of its (nonzero) digits is 3430, while the sum is 28.

The square root of 20070775 is about 4480.0418524831. The cubic root of 20070775 is about 271.7615728897.

Adding to 20070775 its reverse (57707002), we get a palindrome (77777777).

The spelling of 20070775 in words is "twenty million, seventy thousand, seven hundred seventy-five".