21889975470 has 128 divisors (see below), whose sum is σ = 58123671552. Its totient is φ = 5231990400.

The previous prime is 21889975469. The next prime is 21889975493. The reversal of 21889975470 is 7457998812.

It is a Curzon number.

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 63 ways as a sum of consecutive naturals, for example, 8014005 + ... + 8016735.

It is an arithmetic number, because the mean of its divisors is an integer number (454091184).

Almost surely, 2^21889975470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21889975470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29061835776).

21889975470 is an abundant number, since it is smaller than the sum of its proper divisors (36233696082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21889975470 is a wasteful number, since it uses less digits than its factorization.

21889975470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3086.

The product of its (nonzero) digits is 10160640, while the sum is 60.

The spelling of 21889975470 in words is "twenty-one billion, eight hundred eighty-nine million, nine hundred seventy-five thousand, four hundred seventy".