20402044200442 has 16 divisors (see below), whose sum is σ = 30610174389120. Its totient is φ = 10198653024112.

The previous prime is 20402044200427. The next prime is 20402044200487. The reversal of 20402044200442 is 24400244020402.

It is a self number, because there is not a number n which added to its sum of digits gives 20402044200442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163071603 + ... + 163196665.

It is an arithmetic number, because the mean of its divisors is an integer number (1913135899320).

Almost surely, 2^{20402044200442} is an apocalyptic number.

20402044200442 is a deficient number, since it is larger than the sum of its proper divisors (10208130188678).

20402044200442 is a wasteful number, since it uses less digits than its factorization.

20402044200442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143357.

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 20402044200442 its reverse (24400244020402), we get a palindrome (44802288220844).

The spelling of 20402044200442 in words is "twenty trillion, four hundred two billion, forty-four million, two hundred thousand, four hundred forty-two".