20562242 has 4 divisors (see below), whose sum is σ = 30843366. Its totient is φ = 10281120.

The previous prime is 20562229. The next prime is 20562257. The reversal of 20562242 is 24226502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24226502 = 2 ⋅12113251.

It can be written as a sum of positive squares in only one way, i.e., 16072081 + 4490161 = 4009^2 + 2119^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5140559 + ... + 5140562.

Almost surely, 2^20562242 is an apocalyptic number.

20562242 is a deficient number, since it is larger than the sum of its proper divisors (10281124).

20562242 is a wasteful number, since it uses less digits than its factorization.

20562242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10281123.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 20562242 is about 4534.5608387142. The cubic root of 20562242 is about 273.9618910894.

Adding to 20562242 its reverse (24226502), we get a palindrome (44788744).

The spelling of 20562242 in words is "twenty million, five hundred sixty-two thousand, two hundred forty-two".