20020223402 has 4 divisors (see below), whose sum is σ = 30030335106. Its totient is φ = 10010111700.

The previous prime is 20020223381. The next prime is 20020223407. The reversal of 20020223402 is 20432202002.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20432202002 = 2 ⋅10216101001.

It can be written as a sum of positive squares in only one way, i.e., 18698101081 + 1322122321 = 136741^2 + 36361^2 .

It is not an unprimeable number, because it can be changed into a prime (20020223407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005055849 + ... + 5005055852.

Almost surely, 2^20020223402 is an apocalyptic number.

20020223402 is a deficient number, since it is larger than the sum of its proper divisors (10010111704).

20020223402 is a wasteful number, since it uses less digits than its factorization.

20020223402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10010111703.

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 20020223402 its reverse (20432202002), we get a palindrome (40452425404).

The spelling of 20020223402 in words is "twenty billion, twenty million, two hundred twenty-three thousand, four hundred two".