21506465150213 has 8 divisors (see below), whose sum is σ = 22031253671616. Its totient is φ = 20981688085600.

The previous prime is 21506465150173. The next prime is 21506465150221. The reversal of 21506465150213 is 31205156460512.

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 21506465150213 - 2²⁰ = 21506464101637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21506465150293) 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, 998768 + ... + 6634038.

It is an arithmetic number, because the mean of its divisors is an integer number (2753906708952).

Almost surely, 2^{21506465150213} is an apocalyptic number.

It is an amenable number.

21506465150213 is a deficient number, since it is larger than the sum of its proper divisors (524788521403).

21506465150213 is an equidigital number, since it uses as much as digits as its factorization.

21506465150213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5728395.

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 21506465150213 in words is "twenty-one trillion, five hundred six billion, four hundred sixty-five million, one hundred fifty thousand, two hundred thirteen".