20528122 has 4 divisors (see below), whose sum is σ = 30792186. Its totient is φ = 10264060.

The previous prime is 20528087. The next prime is 20528171. The reversal of 20528122 is 22182502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22182502 = 2 ⋅11091251.

It can be written as a sum of positive squares in only one way, i.e., 14676561 + 5851561 = 3831^2 + 2419^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 20528093 and 20528102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5132029 + ... + 5132032.

Almost surely, 2^20528122 is an apocalyptic number.

20528122 is a deficient number, since it is larger than the sum of its proper divisors (10264064).

20528122 is a wasteful number, since it uses less digits than its factorization.

20528122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10264063.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 20528122 is about 4530.7970601209. The cubic root of 20528122 is about 273.8102741142.

The spelling of 20528122 in words is "twenty million, five hundred twenty-eight thousand, one hundred twenty-two".