21809013114 has 32 divisors (see below), whose sum is σ = 49854205440. Its totient is φ = 6230517552.

The previous prime is 21809013113. The next prime is 21809013197. The reversal of 21809013114 is 41131090812.

It is not an unprimeable number, because it can be changed into a prime (21809013113) 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, 537297 + ... + 576459.

It is an arithmetic number, because the mean of its divisors is an integer number (1557943920).

Almost surely, 2^21809013114 is an apocalyptic number.

21809013114 is an abundant number, since it is smaller than the sum of its proper divisors (28045192326).

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

21809013114 is a wasteful number, since it uses less digits than its factorization.

21809013114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52434.

The product of its (nonzero) digits is 1728, while the sum is 30.

The spelling of 21809013114 in words is "twenty-one billion, eight hundred nine million, thirteen thousand, one hundred fourteen".