21738447228201 has 32 divisors (see below), whose sum is σ = 33004413757440. Its totient is φ = 12598144310400.

The previous prime is 21738447228191. The next prime is 21738447228203. The reversal of 21738447228201 is 10282274483712.

It is not a de Polignac number, because 21738447228201 - 2¹⁵ = 21738447195433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21738447228203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1895316 + ... + 6860693.

It is an arithmetic number, because the mean of its divisors is an integer number (1031387929920).

Almost surely, 2^{21738447228201} is an apocalyptic number.

It is an amenable number.

21738447228201 is a deficient number, since it is larger than the sum of its proper divisors (11265966529239).

21738447228201 is a wasteful number, since it uses less digits than its factorization.

21738447228201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8759317.

The product of its (nonzero) digits is 2408448, while the sum is 51.

The spelling of 21738447228201 in words is "twenty-one trillion, seven hundred thirty-eight billion, four hundred forty-seven million, two hundred twenty-eight thousand, two hundred one".