20775130 has 16 divisors (see below), whose sum is σ = 38406600. Its totient is φ = 8085312.

The previous prime is 20775127. The next prime is 20775133. The reversal of 20775130 is 3157702.

It is an interprime number because it is at equal distance from previous prime (20775127) and next prime (20775133).

It can be written as a sum of positive squares in 4 ways, for example, as 20620681 + 154449 = 4541^2 + 393^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20775095 and 20775104.

It is not an unprimeable number, because it can be changed into a prime (20775133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27705 + ... + 28444.

Almost surely, 2^20775130 is an apocalyptic number.

20775130 is a deficient number, since it is larger than the sum of its proper divisors (17631470).

20775130 is a wasteful number, since it uses less digits than its factorization.

20775130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56193.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 20775130 is about 4557.9743307746. The cubic root of 20775130 is about 274.9041208454.

The spelling of 20775130 in words is "twenty million, seven hundred seventy-five thousand, one hundred thirty".