83102420138 has 4 divisors (see below), whose sum is σ = 124653630210. Its totient is φ = 41551210068.

The previous prime is 83102420131. The next prime is 83102420147.

83102420138 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72666367489 + 10436052649 = 269567^2 + 102157^2 .

It is not an unprimeable number, because it can be changed into a prime (83102420131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20775605033 + ... + 20775605036.

Almost surely, 2^83102420138 is an apocalyptic number.

83102420138 is a deficient number, since it is larger than the sum of its proper divisors (41551210072).

83102420138 is a wasteful number, since it uses less digits than its factorization.

83102420138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41551210071.

The product of its (nonzero) digits is 9216, while the sum is 32.

The spelling of 83102420138 in words is "eighty-three billion, one hundred two million, four hundred twenty thousand, one hundred thirty-eight".