10531383920 has 40 divisors (see below), whose sum is σ = 24505150320. Its totient is φ = 4209167360.

The previous prime is 10531383899. The next prime is 10531383971. The reversal of 10531383920 is 2938313501.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×10531383920² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48440 + ... + 153000.

It is an arithmetic number, because the mean of its divisors is an integer number (612628758).

Almost surely, 2^10531383920 is an apocalyptic number.

10531383920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10531383920 is an abundant number, since it is smaller than the sum of its proper divisors (13973766400).

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

10531383920 is a wasteful number, since it uses less digits than its factorization.

10531383920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105833 (or 105827 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 35.

The spelling of 10531383920 in words is "ten billion, five hundred thirty-one million, three hundred eighty-three thousand, nine hundred twenty".