42150021999 has 16 divisors (see below), whose sum is σ = 58469744640. Its totient is φ = 26979432480.

The previous prime is 42150021961. The next prime is 42150022021. The reversal of 42150021999 is 99912005124.

It is not a de Polignac number, because 42150021999 - 2⁷ = 42150021871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42150021999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42150021959) 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 15 ways as a sum of consecutive naturals, for example, 1772544 + ... + 1796165.

It is an arithmetic number, because the mean of its divisors is an integer number (3654359040).

Almost surely, 2^42150021999 is an apocalyptic number.

42150021999 is a deficient number, since it is larger than the sum of its proper divisors (16319722641).

42150021999 is a wasteful number, since it uses less digits than its factorization.

42150021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3568870.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 42150021999 in words is "forty-two billion, one hundred fifty million, twenty-one thousand, nine hundred ninety-nine".