21342504445 has 4 divisors (see below), whose sum is σ = 25611005340. Its totient is φ = 17074003552.

The previous prime is 21342504401. The next prime is 21342504461. The reversal of 21342504445 is 54440524312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16680755716 + 4661748729 = 129154^2 + 68277^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342504445 - 2⁹ = 21342503933 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21342504445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2134250440 + ... + 2134250449.

It is an arithmetic number, because the mean of its divisors is an integer number (6402751335).

Almost surely, 2^21342504445 is an apocalyptic number.

It is an amenable number.

21342504445 is a deficient number, since it is larger than the sum of its proper divisors (4268500895).

21342504445 is an equidigital number, since it uses as much as digits as its factorization.

21342504445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268500894.

The product of its (nonzero) digits is 76800, while the sum is 34.

The spelling of 21342504445 in words is "twenty-one billion, three hundred forty-two million, five hundred four thousand, four hundred forty-five".