20213422402 has 16 divisors (see below), whose sum is σ = 30462161400. Its totient is φ = 10059413760.

The previous prime is 20213422391. The next prime is 20213422409. The reversal of 20213422402 is 20422431202.

It can be written as a sum of positive squares in 4 ways, for example, as 18384919281 + 1828503121 = 135591^2 + 42761^2 .

It is not an unprimeable number, because it can be changed into a prime (20213422409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 987124 + ... + 1007392.

Almost surely, 2^20213422402 is an apocalyptic number.

20213422402 is a deficient number, since it is larger than the sum of its proper divisors (10248738998).

20213422402 is a wasteful number, since it uses less digits than its factorization.

20213422402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22581.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 20213422402 its reverse (20422431202), we get a palindrome (40635853604).

The spelling of 20213422402 in words is "twenty billion, two hundred thirteen million, four hundred twenty-two thousand, four hundred two".