11913057329220 has 36 divisors (see below), whose sum is σ = 36136273899180. Its totient is φ = 3176815287744.

The previous prime is 11913057329189. The next prime is 11913057329227. The reversal of 11913057329220 is 2292375031911.

11913057329220 is a `hidden beast` number, since 1 + 1 + 9 + 1 + 30 + 573 + 29 + 2 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3441499896384 + 8471557432836 = 1855128^2 + 2910594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (11913057329227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33091825735 + ... + 33091826094.

Almost surely, 2^{11913057329220} is an apocalyptic number.

11913057329220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11913057329220 is an abundant number, since it is smaller than the sum of its proper divisors (24223216569960).

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

11913057329220 is a wasteful number, since it uses less digits than its factorization.

11913057329220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66183651844 (or 66183651839 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The spelling of 11913057329220 in words is "eleven trillion, nine hundred thirteen billion, fifty-seven million, three hundred twenty-nine thousand, two hundred twenty".