20445438342 has 32 divisors (see below), whose sum is σ = 46739395584. Its totient is φ = 5840683200.

The previous prime is 20445438337. The next prime is 20445438353. The reversal of 20445438342 is 24383454402.

It is a self number, because there is not a number n which added to its sum of digits gives 20445438342.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281667 + ... + 346737.

It is an arithmetic number, because the mean of its divisors is an integer number (1460606112).

Almost surely, 2^20445438342 is an apocalyptic number.

20445438342 is an abundant number, since it is smaller than the sum of its proper divisors (26293957242).

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

20445438342 is a wasteful number, since it uses less digits than its factorization.

20445438342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72564.

The product of its (nonzero) digits is 368640, while the sum is 39.

The spelling of 20445438342 in words is "twenty billion, four hundred forty-five million, four hundred thirty-eight thousand, three hundred forty-two".