21901750204 has 24 divisors (see below), whose sum is σ = 39405352448. Its totient is φ = 10645493040.

The previous prime is 21901750181. The next prime is 21901750279. The reversal of 21901750204 is 40205710912.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 265452 + ... + 338035.

Almost surely, 2^21901750204 is an apocalyptic number.

It is an amenable number.

21901750204 is a deficient number, since it is larger than the sum of its proper divisors (17503602244).

21901750204 is a wasteful number, since it uses less digits than its factorization.

21901750204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603745 (or 603743 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The spelling of 21901750204 in words is "twenty-one billion, nine hundred one million, seven hundred fifty thousand, two hundred four".