20255122 has 4 divisors (see below), whose sum is σ = 30382686. Its totient is φ = 10127560.

The previous prime is 20255117. The next prime is 20255153. The reversal of 20255122 is 22155202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22155202 = 2 ⋅11077601.

It can be written as a sum of positive squares in only one way, i.e., 16982641 + 3272481 = 4121^2 + 1809^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20255122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5063779 + ... + 5063782.

Almost surely, 2^20255122 is an apocalyptic number.

20255122 is a deficient number, since it is larger than the sum of its proper divisors (10127564).

20255122 is a wasteful number, since it uses less digits than its factorization.

20255122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10127563.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 20255122 is about 4500.5690751282. The cubic root of 20255122 is about 272.5910679546.

The spelling of 20255122 in words is "twenty million, two hundred fifty-five thousand, one hundred twenty-two".