21352045215 has 8 divisors (see below), whose sum is σ = 34163272368. Its totient is φ = 11387757440.

The previous prime is 21352045199. The next prime is 21352045217. The reversal of 21352045215 is 51254025312.

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

It is not a de Polignac number, because 21352045215 - 2⁴ = 21352045199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352045217) 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, 711734826 + ... + 711734855.

It is an arithmetic number, because the mean of its divisors is an integer number (4270409046).

Almost surely, 2^21352045215 is an apocalyptic number.

21352045215 is a deficient number, since it is larger than the sum of its proper divisors (12811227153).

21352045215 is a wasteful number, since it uses less digits than its factorization.

21352045215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1423469689.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 21352045215 in words is "twenty-one billion, three hundred fifty-two million, forty-five thousand, two hundred fifteen".