21294150336 has 84 divisors (see below), whose sum is σ = 61202754912. Its totient is φ = 7078639104.

The previous prime is 21294150323. The next prime is 21294150403. The reversal of 21294150336 is 63305149212.

21294150336 is a `hidden beast` number, since 21 + 294 + 15 + 0 + 336 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 21294150336.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161026 + ... + 261758.

Almost surely, 2^21294150336 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21294150336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30601377456).

21294150336 is an abundant number, since it is smaller than the sum of its proper divisors (39908604576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21294150336 is a wasteful number, since it uses less digits than its factorization.

21294150336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101118 (or 101105 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

Adding to 21294150336 its reverse (63305149212), we get a palindrome (84599299548).

The spelling of 21294150336 in words is "twenty-one billion, two hundred ninety-four million, one hundred fifty thousand, three hundred thirty-six".