2037187921 has 8 divisors (see below), whose sum is σ = 2092865960. Its totient is φ = 1981542528.

The previous prime is 2037187907. The next prime is 2037187927. The reversal of 2037187921 is 1297817302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 325297296 + 1711890625 = 18036^2 + 41375^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2037187921 - 2¹¹ = 2037185873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2037187927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 171445 + ... + 182941.

It is an arithmetic number, because the mean of its divisors is an integer number (261608245).

Almost surely, 2^2037187921 is an apocalyptic number.

It is an amenable number.

2037187921 is a deficient number, since it is larger than the sum of its proper divisors (55678039).

2037187921 is a wasteful number, since it uses less digits than its factorization.

2037187921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16323.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 2037187921 is about 45135.2181893474. The cubic root of 2037187921 is about 1267.6821179104.

The spelling of 2037187921 in words is "two billion, thirty-seven million, one hundred eighty-seven thousand, nine hundred twenty-one".