21152404346215 has 16 divisors (see below), whose sum is σ = 25469354188800. Its totient is φ = 16864340199840.

The previous prime is 21152404346153. The next prime is 21152404346219. The reversal of 21152404346215 is 51264340425112.

It is not a de Polignac number, because 21152404346215 - 2²⁷ = 21152270128487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152404346219) 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, 1218865 + ... + 6617434.

It is an arithmetic number, because the mean of its divisors is an integer number (1591834636800).

Almost surely, 2^{21152404346215} is an apocalyptic number.

21152404346215 is a deficient number, since it is larger than the sum of its proper divisors (4316949842585).

21152404346215 is a wasteful number, since it uses less digits than its factorization.

21152404346215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7838142.

The product of its (nonzero) digits is 230400, while the sum is 40.

The spelling of 21152404346215 in words is "twenty-one trillion, one hundred fifty-two billion, four hundred four million, three hundred forty-six thousand, two hundred fifteen".