42019492138 has 48 divisors (see below), whose sum is σ = 69708975840. Its totient is φ = 18882376992.

The previous prime is 42019492129. The next prime is 42019492139. The reversal of 42019492138 is 83129491024.

It is a super-2 number, since 2×42019492138² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42019492094 and 42019492103.

It is not an unprimeable number, because it can be changed into a prime (42019492139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9681973 + ... + 9686311.

It is an arithmetic number, because the mean of its divisors is an integer number (1452270330).

Almost surely, 2^42019492138 is an apocalyptic number.

42019492138 is a deficient number, since it is larger than the sum of its proper divisors (27689483702).

42019492138 is a wasteful number, since it uses less digits than its factorization.

42019492138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4579 (or 4520 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 42019492138 in words is "forty-two billion, nineteen million, four hundred ninety-two thousand, one hundred thirty-eight".