20103993 has 24 divisors (see below), whose sum is σ = 35741888. Its totient is φ = 10603872.

The previous prime is 20103977. The next prime is 20104003. The reversal of 20103993 is 39930102.

It is not a de Polignac number, because 20103993 - 2⁴ = 20103977 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20103493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11455 + ... + 13092.

Almost surely, 2^20103993 is an apocalyptic number.

It is an amenable number.

20103993 is a deficient number, since it is larger than the sum of its proper divisors (15637895).

20103993 is a wasteful number, since it uses less digits than its factorization.

20103993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24573 (or 24570 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 20103993 is about 4483.7476512400. The cubic root of 20103993 is about 271.9114159703.

The spelling of 20103993 in words is "twenty million, one hundred three thousand, nine hundred ninety-three".