20107381 has 8 divisors (see below), whose sum is σ = 23037824. Its totient is φ = 17191440.

The previous prime is 20107363. The next prime is 20107393. The reversal of 20107381 is 18370102.

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

It is not a de Polignac number, because 20107381 - 2⁵ = 20107349 is a prime.

It is a super-2 number, since 2×20107381² = 808613541358322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20107361) 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, 465 + ... + 6358.

It is an arithmetic number, because the mean of its divisors is an integer number (2879728).

Almost surely, 2^20107381 is an apocalyptic number.

It is an amenable number.

20107381 is a deficient number, since it is larger than the sum of its proper divisors (2930443).

20107381 is an equidigital number, since it uses as much as digits as its factorization.

20107381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7251.

The product of its (nonzero) digits is 336, while the sum is 22.

The square root of 20107381 is about 4484.1254442756. The cubic root of 20107381 is about 271.9266896215.

Adding to 20107381 its reverse (18370102), we get a palindrome (38477483).

The spelling of 20107381 in words is "twenty million, one hundred seven thousand, three hundred eighty-one".