91820103724 has 12 divisors (see below), whose sum is σ = 170137251144. Its totient is φ = 43209460544.

The previous prime is 91820103719. The next prime is 91820103773. The reversal of 91820103724 is 42730102819.

It is a super-2 number, since 2×91820103724² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 675147754 + ... + 675147889.

It is an arithmetic number, because the mean of its divisors is an integer number (14178104262).

Almost surely, 2^91820103724 is an apocalyptic number.

It is an amenable number.

91820103724 is a deficient number, since it is larger than the sum of its proper divisors (78317147420).

91820103724 is a wasteful number, since it uses less digits than its factorization.

91820103724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1350295664 (or 1350295662 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 91820103724 in words is "ninety-one billion, eight hundred twenty million, one hundred three thousand, seven hundred twenty-four".