21006550014 has 16 divisors (see below), whose sum is σ = 42017146752. Its totient is φ = 7001508888.

The previous prime is 21006550013. The next prime is 21006550027. The reversal of 21006550014 is 41005560012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21006550013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98914 + ... + 227589.

It is an arithmetic number, because the mean of its divisors is an integer number (2626071672).

Almost surely, 2^21006550014 is an apocalyptic number.

21006550014 is an abundant number, since it is smaller than the sum of its proper divisors (21010596738).

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

21006550014 is a wasteful number, since it uses less digits than its factorization.

21006550014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337231.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 21006550014 in words is "twenty-one billion, six million, five hundred fifty thousand, fourteen".