21256016160336 has 40 divisors (see below), whose sum is σ = 56682709764864. Its totient is φ = 6856779406080.

The previous prime is 21256016160329. The next prime is 21256016160383. The reversal of 21256016160336 is 63306161065212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7142477061 + ... + 7142480036.

Almost surely, 2^{21256016160336} is an apocalyptic number.

It is an amenable number.

21256016160336 is an abundant number, since it is smaller than the sum of its proper divisors (35426693604528).

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

21256016160336 is a wasteful number, since it uses less digits than its factorization.

21256016160336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14284957139 (or 14284957133 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 21256016160336 in words is "twenty-one trillion, two hundred fifty-six billion, sixteen million, one hundred sixty thousand, three hundred thirty-six".