20402224404402 has 64 divisors (see below), whose sum is σ = 43216102886400. Its totient is φ = 6407663152704.

The previous prime is 20402224404377. The next prime is 20402224404409. The reversal of 20402224404402 is 20440442220402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20402224404402.

It is not an unprimeable number, because it can be changed into a prime (20402224404409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271452724 + ... + 271527872.

It is an arithmetic number, because the mean of its divisors is an integer number (675251607600).

Almost surely, 2^{20402224404402} is an apocalyptic number.

20402224404402 is an abundant number, since it is smaller than the sum of its proper divisors (22813878481998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20402224404402 is a wasteful number, since it uses less digits than its factorization.

20402224404402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104607.

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 20402224404402 its reverse (20440442220402), we get a palindrome (40842666624804).

The spelling of 20402224404402 in words is "twenty trillion, four hundred two billion, two hundred twenty-four million, four hundred four thousand, four hundred two".