21465464511 has 8 divisors (see below), whose sum is σ = 30304185264. Its totient is φ = 13468526720.

The previous prime is 21465464497. The next prime is 21465464533. The reversal of 21465464511 is 11546456412.

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

It is a cyclic number.

It is not a de Polignac number, because 21465464511 - 2⁵ = 21465464479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21465464511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21465464561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210445680 + ... + 210445781.

It is an arithmetic number, because the mean of its divisors is an integer number (3788023158).

Almost surely, 2^21465464511 is an apocalyptic number.

21465464511 is a deficient number, since it is larger than the sum of its proper divisors (8838720753).

21465464511 is a wasteful number, since it uses less digits than its factorization.

21465464511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420891481.

The product of its digits is 115200, while the sum is 39.

The spelling of 21465464511 in words is "twenty-one billion, four hundred sixty-five million, four hundred sixty-four thousand, five hundred eleven".