20225402 has 4 divisors (see below), whose sum is σ = 30338106. Its totient is φ = 10112700.

The previous prime is 20225371. The next prime is 20225419. The reversal of 20225402 is 20452202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17131321 + 3094081 = 4139^2 + 1759^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5056349 + ... + 5056352.

Almost surely, 2^20225402 is an apocalyptic number.

20225402 is a deficient number, since it is larger than the sum of its proper divisors (10112704).

20225402 is a wasteful number, since it uses less digits than its factorization.

20225402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10112703.

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 20225402 is about 4497.2660583959. The cubic root of 20225402 is about 272.4576799302.

Adding to 20225402 its reverse (20452202), we get a palindrome (40677604).

The spelling of 20225402 in words is "twenty million, two hundred twenty-five thousand, four hundred two".