21011319529308 has 48 divisors (see below), whose sum is σ = 54585647343360. Its totient is φ = 6989391694512.

The previous prime is 21011319529303. The next prime is 21011319529337. The reversal of 21011319529308 is 80392591311012.

21011319529308 is a `hidden beast` number, since 2 + 1 + 0 + 1 + 1 + 319 + 5 + 29 + 308 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011319529303) 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, 199689966 + ... + 199795157.

It is an arithmetic number, because the mean of its divisors is an integer number (1137200986320).

Almost surely, 2^{21011319529308} is an apocalyptic number.

It is an amenable number.

21011319529308 is an abundant number, since it is smaller than the sum of its proper divisors (33574327814052).

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

21011319529308 is a wasteful number, since it uses less digits than its factorization.

21011319529308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399485623 (or 399485615 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The spelling of 21011319529308 in words is "twenty-one trillion, eleven billion, three hundred nineteen million, five hundred twenty-nine thousand, three hundred eight".