21141500465 has 16 divisors (see below), whose sum is σ = 25543740096. Its totient is φ = 16797451200.

The previous prime is 21141500449. The next prime is 21141500467. The reversal of 21141500465 is 56400514112.

It is not a de Polignac number, because 21141500465 - 2⁴ = 21141500449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21141500467) 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, 827330 + ... + 852500.

It is an arithmetic number, because the mean of its divisors is an integer number (1596483756).

Almost surely, 2^21141500465 is an apocalyptic number.

It is an amenable number.

21141500465 is a deficient number, since it is larger than the sum of its proper divisors (4402239631).

21141500465 is a wasteful number, since it uses less digits than its factorization.

21141500465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26320.

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 21141500465 in words is "twenty-one billion, one hundred forty-one million, five hundred thousand, four hundred sixty-five".