20242420402 has 4 divisors (see below), whose sum is σ = 30363630606. Its totient is φ = 10121210200.

The previous prime is 20242420381. The next prime is 20242420447. The reversal of 20242420402 is 20402424202.

It is a happy number.

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., 13818237601 + 6424182801 = 117551^2 + 80151^2 .

It is a super-3 number, since 3×20242420402³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

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, 5060605099 + ... + 5060605102.

Almost surely, 2^20242420402 is an apocalyptic number.

20242420402 is a deficient number, since it is larger than the sum of its proper divisors (10121210204).

20242420402 is a wasteful number, since it uses less digits than its factorization.

20242420402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10121210203.

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 20242420402 its reverse (20402424202), we get a palindrome (40644844604).

The spelling of 20242420402 in words is "twenty billion, two hundred forty-two million, four hundred twenty thousand, four hundred two".