21850091542 has 48 divisors (see below), whose sum is σ = 35940013200. Its totient is φ = 9929433600.

The previous prime is 21850091539. The next prime is 21850091581. The reversal of 21850091542 is 24519005812.

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 23 ways as a sum of consecutive naturals, for example, 5795434 + ... + 5799202.

It is an arithmetic number, because the mean of its divisors is an integer number (748750275).

Almost surely, 2^21850091542 is an apocalyptic number.

21850091542 is a deficient number, since it is larger than the sum of its proper divisors (14089921658).

21850091542 is a wasteful number, since it uses less digits than its factorization.

21850091542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3953 (or 3892 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The spelling of 21850091542 in words is "twenty-one billion, eight hundred fifty million, ninety-one thousand, five hundred forty-two".