20122775 has 12 divisors (see below), whose sum is σ = 25424712. Its totient is φ = 15793440.

The previous prime is 20122763. The next prime is 20122787. The reversal of 20122775 is 57722102.

It is an interprime number because it is at equal distance from previous prime (20122763) and next prime (20122787).

It is not a de Polignac number, because 20122775 - 2⁸ = 20122519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6269 + ... + 8918.

It is an arithmetic number, because the mean of its divisors is an integer number (2118726).

Almost surely, 2^20122775 is an apocalyptic number.

20122775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20122775 is a deficient number, since it is larger than the sum of its proper divisors (5301937).

20122775 is a wasteful number, since it uses less digits than its factorization.

20122775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15250 (or 15245 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 26.

The square root of 20122775 is about 4485.8416155723. The cubic root of 20122775 is about 271.9960666602.

Adding to 20122775 its reverse (57722102), we get a palindrome (77844877).

The spelling of 20122775 in words is "twenty million, one hundred twenty-two thousand, seven hundred seventy-five".