19401093 has 8 divisors (see below), whose sum is σ = 28742400. Its totient is φ = 12934044.

The previous prime is 19401091. The next prime is 19401143. The reversal of 19401093 is 39010491.

It is not a de Polignac number, because 19401093 - 2¹ = 19401091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 718559 = 19401093 / (1 + 9 + 4 + 0 + 1 + 0 + 9 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19401091) 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, 359253 + ... + 359306.

It is an arithmetic number, because the mean of its divisors is an integer number (3592800).

Almost surely, 2^19401093 is an apocalyptic number.

It is an amenable number.

19401093 is a deficient number, since it is larger than the sum of its proper divisors (9341307).

19401093 is an equidigital number, since it uses as much as digits as its factorization.

19401093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718568 (or 718562 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 19401093 is about 4404.6671837949. The cubic root of 19401093 is about 268.7047843167.

The spelling of 19401093 in words is "nineteen million, four hundred one thousand, ninety-three".