21422424402 has 16 divisors (see below), whose sum is σ = 47605387680. Its totient is φ = 7140808116.

The previous prime is 21422424383. The next prime is 21422424403. The reversal of 21422424402 is 20442422412.

21422424402 is a `hidden beast` number, since 2 + 14 + 2 + 242 + 4 + 402 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (21422424403) 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, 198355728 + ... + 198355835.

It is an arithmetic number, because the mean of its divisors is an integer number (2975336730).

Almost surely, 2^21422424402 is an apocalyptic number.

21422424402 is an abundant number, since it is smaller than the sum of its proper divisors (26182963278).

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

21422424402 is a wasteful number, since it uses less digits than its factorization.

21422424402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396711574 (or 396711568 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 21422424402 its reverse (20442422412), we get a palindrome (41864846814).

The spelling of 21422424402 in words is "twenty-one billion, four hundred twenty-two million, four hundred twenty-four thousand, four hundred two".