21889560903 has 16 divisors (see below), whose sum is σ = 33425172480. Its totient is φ = 12482201376.

The previous prime is 21889560883. The next prime is 21889560937. The reversal of 21889560903 is 30906598812.

It is a happy number.

It is not a de Polignac number, because 21889560903 - 2¹⁷ = 21889429831 is a prime.

It is a super-2 number, since 2×21889560903² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21889560403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1078000 + ... + 1098117.

It is an arithmetic number, because the mean of its divisors is an integer number (2089073280).

Almost surely, 2^21889560903 is an apocalyptic number.

21889560903 is a deficient number, since it is larger than the sum of its proper divisors (11535611577).

21889560903 is a wasteful number, since it uses less digits than its factorization.

21889560903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176606.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 21889560903 in words is "twenty-one billion, eight hundred eighty-nine million, five hundred sixty thousand, nine hundred three".