11731534420 has 48 divisors (see below), whose sum is σ = 27458343360. Its totient is φ = 4184123904.

The previous prime is 11731534361. The next prime is 11731534427. The reversal of 11731534420 is 2443513711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11731534427) 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 15 ways as a sum of consecutive naturals, for example, 901554 + ... + 914473.

It is an arithmetic number, because the mean of its divisors is an integer number (572048820).

Almost surely, 2^11731534420 is an apocalyptic number.

11731534420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11731534420 is an abundant number, since it is smaller than the sum of its proper divisors (15726808940).

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

11731534420 is a wasteful number, since it uses less digits than its factorization.

11731534420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816072 (or 1816070 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 11731534420 in words is "eleven billion, seven hundred thirty-one million, five hundred thirty-four thousand, four hundred twenty".