20837168442 has 12 divisors (see below), whose sum is σ = 45147198330. Its totient is φ = 6945722808.

The previous prime is 20837168437. The next prime is 20837168449. The reversal of 20837168442 is 24486173802.

It is a happy number.

20837168442 is a `hidden beast` number, since 2 + 0 + 83 + 71 + 68 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11588307201 + 9248861241 = 107649^2 + 96171^2 .

It is not an unprimeable number, because it can be changed into a prime (20837168449) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 578810217 + ... + 578810252.

Almost surely, 2^20837168442 is an apocalyptic number.

20837168442 is an abundant number, since it is smaller than the sum of its proper divisors (24310029888).

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

20837168442 is a wasteful number, since it uses less digits than its factorization.

20837168442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157620477 (or 1157620474 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 20837168442 in words is "twenty billion, eight hundred thirty-seven million, one hundred sixty-eight thousand, four hundred forty-two".