42001918406 has 32 divisors (see below), whose sum is σ = 74612197440. Its totient is φ = 17350695936.

The previous prime is 42001918397. The next prime is 42001918421. The reversal of 42001918406 is 60481910024.

It is a happy number.

It is a super-2 number, since 2×42001918406² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 153530 + ... + 327986.

It is an arithmetic number, because the mean of its divisors is an integer number (2331631170).

Almost surely, 2^42001918406 is an apocalyptic number.

42001918406 is a deficient number, since it is larger than the sum of its proper divisors (32610279034).

42001918406 is a wasteful number, since it uses less digits than its factorization.

42001918406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175088.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 42001918406 in words is "forty-two billion, one million, nine hundred eighteen thousand, four hundred six".