11837572921 has 16 divisors (see below), whose sum is σ = 12327418368. Its totient is φ = 11354889600.

The previous prime is 11837572861. The next prime is 11837572927. The reversal of 11837572921 is 12927573811.

It is not a de Polignac number, because 11837572921 - 2¹¹ = 11837570873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11837572927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1857781 + ... + 1864141.

It is an arithmetic number, because the mean of its divisors is an integer number (770463648).

Almost surely, 2^11837572921 is an apocalyptic number.

It is an amenable number.

11837572921 is a deficient number, since it is larger than the sum of its proper divisors (489845447).

11837572921 is a wasteful number, since it uses less digits than its factorization.

11837572921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6912.

The product of its digits is 211680, while the sum is 46.

The spelling of 11837572921 in words is "eleven billion, eight hundred thirty-seven million, five hundred seventy-two thousand, nine hundred twenty-one".