21265035045 has 16 divisors (see below), whose sum is σ = 34030685952. Its totient is φ = 11339142080.

The previous prime is 21265035037. The next prime is 21265035047. The reversal of 21265035045 is 54053056212.

It is not a de Polignac number, because 21265035045 - 2³ = 21265035037 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 21265034997 and 21265035015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21265035047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57042 + ... + 213971.

It is an arithmetic number, because the mean of its divisors is an integer number (2126917872).

Almost surely, 2^21265035045 is an apocalyptic number.

It is an amenable number.

21265035045 is a deficient number, since it is larger than the sum of its proper divisors (12765650907).

21265035045 is a wasteful number, since it uses less digits than its factorization.

21265035045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276252.

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 21265035045 in words is "twenty-one billion, two hundred sixty-five million, thirty-five thousand, forty-five".