21901189110 has 32 divisors (see below), whose sum is σ = 53983474272. Its totient is φ = 5682470400.

The previous prime is 21901189103. The next prime is 21901189111. The reversal of 21901189110 is 1198110912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21901189111) 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, 9864291 + ... + 9866510.

It is an arithmetic number, because the mean of its divisors is an integer number (1686983571).

Almost surely, 2^21901189110 is an apocalyptic number.

21901189110 is an abundant number, since it is smaller than the sum of its proper divisors (32082285162).

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

21901189110 is a wasteful number, since it uses less digits than its factorization.

21901189110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19730848.

The product of its (nonzero) digits is 1296, while the sum is 33.

The spelling of 21901189110 in words is "twenty-one billion, nine hundred one million, one hundred eighty-nine thousand, one hundred ten".