21004555014 has 48 divisors (see below), whose sum is σ = 47238456720. Its totient is φ = 6995134080.

The previous prime is 21004555009. The next prime is 21004555127. The reversal of 21004555014 is 41055540012.

21004555014 is a `hidden beast` number, since 2 + 100 + 4 + 5 + 550 + 1 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 529554 + ... + 567834.

It is an arithmetic number, because the mean of its divisors is an integer number (984134515).

Almost surely, 2^21004555014 is an apocalyptic number.

21004555014 is an abundant number, since it is smaller than the sum of its proper divisors (26233901706).

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

21004555014 is a wasteful number, since it uses less digits than its factorization.

21004555014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39427 (or 39415 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 21004555014 in words is "twenty-one billion, four million, five hundred fifty-five thousand, fourteen".