20442444402 has 16 divisors (see below), whose sum is σ = 41281830720. Its totient is φ = 6747991152.

The previous prime is 20442444397. The next prime is 20442444409. The reversal of 20442444402 is 20444424402.

It is a super-2 number, since 2×20442444402² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20442444402.

It is not an unprimeable number, because it can be changed into a prime (20442444409) 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, 16538577 + ... + 16539812.

It is an arithmetic number, because the mean of its divisors is an integer number (2580114420).

Almost surely, 2^20442444402 is an apocalyptic number.

20442444402 is an abundant number, since it is smaller than the sum of its proper divisors (20839386318).

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

20442444402 is a wasteful number, since it uses less digits than its factorization.

20442444402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33078497.

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

Adding to 20442444402 its reverse (20444424402), we get a palindrome (40886868804).

The spelling of 20442444402 in words is "twenty billion, four hundred forty-two million, four hundred forty-four thousand, four hundred two".