21555355020014 has 16 divisors (see below), whose sum is σ = 32593549395456. Its totient is φ = 10690869420000.

The previous prime is 21555355019977. The next prime is 21555355020029. The reversal of 21555355020014 is 41002055355512.

It is a self number, because there is not a number n which added to its sum of digits gives 21555355020014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6316217 + ... + 9110724.

It is an arithmetic number, because the mean of its divisors is an integer number (2037096837216).

Almost surely, 2^{21555355020014} is an apocalyptic number.

21555355020014 is a deficient number, since it is larger than the sum of its proper divisors (11038194375442).

21555355020014 is a wasteful number, since it uses less digits than its factorization.

21555355020014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15432571.

The product of its (nonzero) digits is 150000, while the sum is 38.

The spelling of 21555355020014 in words is "twenty-one trillion, five hundred fifty-five billion, three hundred fifty-five million, twenty thousand, fourteen".