21652341315 has 32 divisors (see below), whose sum is σ = 38412755712. Its totient is φ = 10326000000.

The previous prime is 21652341301. The next prime is 21652341343. The reversal of 21652341315 is 51314325612.

It is not a de Polignac number, because 21652341315 - 2¹⁷ = 21652210243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1065561 + ... + 1085690.

It is an arithmetic number, because the mean of its divisors is an integer number (1200398616).

Almost surely, 2^21652341315 is an apocalyptic number.

21652341315 is a deficient number, since it is larger than the sum of its proper divisors (16760414397).

21652341315 is a wasteful number, since it uses less digits than its factorization.

21652341315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151331.

The product of its digits is 21600, while the sum is 33.

Adding to 21652341315 its reverse (51314325612), we get a palindrome (72966666927).

The spelling of 21652341315 in words is "twenty-one billion, six hundred fifty-two million, three hundred forty-one thousand, three hundred fifteen".