21026227045 has 16 divisors (see below), whose sum is σ = 27219751920. Its totient is φ = 15532801024.

The previous prime is 21026227021. The next prime is 21026227099. The reversal of 21026227045 is 54072262012.

It can be written as a sum of positive squares in 8 ways, for example, as 2180703204 + 18845523841 = 46698^2 + 137279^2 .

It is a cyclic number.

It is not a de Polignac number, because 21026227045 - 2¹³ = 21026218853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21026226998 and 21026227016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2329150 + ... + 2338159.

It is an arithmetic number, because the mean of its divisors is an integer number (1701234495).

Almost surely, 2^21026227045 is an apocalyptic number.

It is an amenable number.

21026227045 is a deficient number, since it is larger than the sum of its proper divisors (6193524875).

21026227045 is a wasteful number, since it uses less digits than its factorization.

21026227045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4667384.

The product of its (nonzero) digits is 13440, while the sum is 31.

Adding to 21026227045 its reverse (54072262012), we get a palindrome (75098489057).

The spelling of 21026227045 in words is "twenty-one billion, twenty-six million, two hundred twenty-seven thousand, forty-five".