20151093 has 4 divisors (see below), whose sum is σ = 26868128. Its totient is φ = 13434060.

The previous prime is 20151091. The next prime is 20151097. The reversal of 20151093 is 39015102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20151093 - 2¹ = 20151091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20151091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3358513 + ... + 3358518.

It is an arithmetic number, because the mean of its divisors is an integer number (6717032).

Almost surely, 2^20151093 is an apocalyptic number.

It is an amenable number.

20151093 is a deficient number, since it is larger than the sum of its proper divisors (6717035).

20151093 is an equidigital number, since it uses as much as digits as its factorization.

20151093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6717034.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 20151093 is about 4488.9968812642. The cubic root of 20151093 is about 272.1235966911.

Adding to 20151093 its reverse (39015102), we get a palindrome (59166195).

The spelling of 20151093 in words is "twenty million, one hundred fifty-one thousand, ninety-three".