11913550 has 24 divisors (see below), whose sum is σ = 24174792. Its totient is φ = 4332000.

The previous prime is 11913541. The next prime is 11913553. The reversal of 11913550 is 5531911.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11913553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10281 + ... + 11380.

It is an arithmetic number, because the mean of its divisors is an integer number (1007283).

Almost surely, 2^11913550 is an apocalyptic number.

11913550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11913550 is an abundant number, since it is smaller than the sum of its proper divisors (12261242).

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

11913550 is a wasteful number, since it uses less digits than its factorization.

11913550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21684 (or 21679 counting only the distinct ones).

The product of its (nonzero) digits is 675, while the sum is 25.

The square root of 11913550 is about 3451.6010777609. The cubic root of 11913550 is about 228.3917421510.

The spelling of 11913550 in words is "eleven million, nine hundred thirteen thousand, five hundred fifty".