22202400402 has 128 divisors (see below), whose sum is σ = 60811430400. Its totient is φ = 5847199488.

The previous prime is 22202400343. The next prime is 22202400403. The reversal of 22202400402 is 20400420222.

22202400402 is a `hidden beast` number, since 2 + 2 + 20 + 240 + 0 + 402 = 666.

It is a super-2 number, since 2×22202400402² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (22202400403) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3913624 + ... + 3919292.

It is an arithmetic number, because the mean of its divisors is an integer number (475089300).

Almost surely, 2^22202400402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22202400402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30405715200).

22202400402 is an abundant number, since it is smaller than the sum of its proper divisors (38609029998).

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

22202400402 is a wasteful number, since it uses less digits than its factorization.

22202400402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6497 (or 6491 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

Adding to 22202400402 its reverse (20400420222), we get a palindrome (42602820624).

The spelling of 22202400402 in words is "twenty-two billion, two hundred two million, four hundred thousand, four hundred two".