20020262642 has 16 divisors (see below), whose sum is σ = 30234772152. Its totient is φ = 9942220800.

The previous prime is 20020262641. The next prime is 20020262651. The reversal of 20020262642 is 24626202002.

It can be written as a sum of positive squares in 4 ways, for example, as 20016873361 + 3389281 = 141481^2 + 1841^2 .

It is not an unprimeable number, because it can be changed into a prime (20020262641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133298 + ... + 240434.

Almost surely, 2^20020262642 is an apocalyptic number.

20020262642 is a deficient number, since it is larger than the sum of its proper divisors (10214509510).

20020262642 is a wasteful number, since it uses less digits than its factorization.

20020262642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107773.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 20020262642 its reverse (24626202002), we get a palindrome (44646464644).

The spelling of 20020262642 in words is "twenty billion, twenty million, two hundred sixty-two thousand, six hundred forty-two".