21315536030776 has 64 divisors (see below), whose sum is σ = 43958083881600. Its totient is φ = 9628330073088.

The previous prime is 21315536030731. The next prime is 21315536030797. The reversal of 21315536030776 is 67703063551312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312450846 + ... + 312519058.

It is an arithmetic number, because the mean of its divisors is an integer number (686845060650).

Almost surely, 2^{21315536030776} is an apocalyptic number.

21315536030776 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21315536030776 is an abundant number, since it is smaller than the sum of its proper divisors (22642547850824).

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

21315536030776 is a wasteful number, since it uses less digits than its factorization.

21315536030776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132208 (or 132204 counting only the distinct ones).

The product of its (nonzero) digits is 2381400, while the sum is 49.

The spelling of 21315536030776 in words is "twenty-one trillion, three hundred fifteen billion, five hundred thirty-six million, thirty thousand, seven hundred seventy-six".