18937953 has 6 divisors (see below), whose sum is σ = 27354834. Its totient is φ = 12625296.

The previous prime is 18937951. The next prime is 18937973. The reversal of 18937953 is 35973981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10712529 + 8225424 = 3273^2 + 2868^2 .

It is not a de Polignac number, because 18937953 - 2¹ = 18937951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18937899 and 18937908.

It is not an unprimeable number, because it can be changed into a prime (18937951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1052100 + ... + 1052117.

It is an arithmetic number, because the mean of its divisors is an integer number (4559139).

Almost surely, 2^18937953 is an apocalyptic number.

It is an amenable number.

18937953 is a deficient number, since it is larger than the sum of its proper divisors (8416881).

18937953 is a wasteful number, since it uses less digits than its factorization.

18937953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104223 (or 2104220 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 18937953 is about 4351.7758444111. The cubic root of 18937953 is about 266.5493808880.

The spelling of 18937953 in words is "eighteen million, nine hundred thirty-seven thousand, nine hundred fifty-three".