21201340045 has 8 divisors (see below), whose sum is σ = 26262305280. Its totient is φ = 16413940560.

The previous prime is 21201340031. The next prime is 21201340051. The reversal of 21201340045 is 54004310212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21201340045 - 2²⁷ = 21067122317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21201339998 and 21201340025.

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, 68391265 + ... + 68391574.

It is an arithmetic number, because the mean of its divisors is an integer number (3282788160).

Almost surely, 2^21201340045 is an apocalyptic number.

It is an amenable number.

21201340045 is a deficient number, since it is larger than the sum of its proper divisors (5060965235).

21201340045 is a wasteful number, since it uses less digits than its factorization.

21201340045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136782875.

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 21201340045 its reverse (54004310212), we get a palindrome (75205650257).

The spelling of 21201340045 in words is "twenty-one billion, two hundred one million, three hundred forty thousand, forty-five".