21307225753 has 16 divisors (see below), whose sum is σ = 24579297792. Its totient is φ = 18288144000.

The previous prime is 21307225697. The next prime is 21307225781. The reversal of 21307225753 is 35752270312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21307225753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21307222753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 748026 + ... + 775987.

It is an arithmetic number, because the mean of its divisors is an integer number (1536206112).

Almost surely, 2^21307225753 is an apocalyptic number.

It is an amenable number.

21307225753 is a deficient number, since it is larger than the sum of its proper divisors (3272072039).

21307225753 is a wasteful number, since it uses less digits than its factorization.

21307225753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524096.

The product of its (nonzero) digits is 88200, while the sum is 37.

The spelling of 21307225753 in words is "twenty-one billion, three hundred seven million, two hundred twenty-five thousand, seven hundred fifty-three".