21044455035 has 16 divisors (see below), whose sum is σ = 34581159456. Its totient is φ = 10920365568.

The previous prime is 21044455021. The next prime is 21044455049. The reversal of 21044455035 is 53055444012.

It is an interprime number because it is at equal distance from previous prime (21044455021) and next prime (21044455049).

It is not a de Polignac number, because 21044455035 - 2¹⁸ = 21044192891 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21044454987 and 21044455005.

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, 18958414 + ... + 18959523.

It is an arithmetic number, because the mean of its divisors is an integer number (2161322466).

Almost surely, 2^21044455035 is an apocalyptic number.

21044455035 is a deficient number, since it is larger than the sum of its proper divisors (13536704421).

21044455035 is a wasteful number, since it uses less digits than its factorization.

21044455035 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37917982.

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 21044455035 its reverse (53055444012), we get a palindrome (74099899047).

The spelling of 21044455035 in words is "twenty-one billion, forty-four million, four hundred fifty-five thousand, thirty-five".