22420402 has 4 divisors (see below), whose sum is σ = 33630606. Its totient is φ = 11210200.

The previous prime is 22420379. The next prime is 22420403. The reversal of 22420402 is 20402422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20402422 = 2 ⋅10201211.

It can be written as a sum of positive squares in only one way, i.e., 14907321 + 7513081 = 3861^2 + 2741^2 .

It is not an unprimeable number, because it can be changed into a prime (22420403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5605099 + ... + 5605102.

Almost surely, 2^22420402 is an apocalyptic number.

22420402 is a deficient number, since it is larger than the sum of its proper divisors (11210204).

22420402 is a wasteful number, since it uses less digits than its factorization.

22420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11210203.

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 22420402 is about 4735.0186905650. The cubic root of 22420402 is about 281.9775060441.

Adding to 22420402 its reverse (20402422), we get a palindrome (42822824).

It can be divided in two parts, 22420 and 402, that added together give a palindrome (22822).

The spelling of 22420402 in words is "twenty-two million, four hundred twenty thousand, four hundred two".