20025381 has 4 divisors (see below), whose sum is σ = 26700512. Its totient is φ = 13350252.

The previous prime is 20025353. The next prime is 20025391. The reversal of 20025381 is 18352002.

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 20025381 - 2⁷ = 20025253 is a prime.

It is a super-2 number, since 2×20025381² = 802031768390322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20025311) 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, 3337561 + ... + 3337566.

It is an arithmetic number, because the mean of its divisors is an integer number (6675128).

Almost surely, 2^20025381 is an apocalyptic number.

It is an amenable number.

20025381 is a deficient number, since it is larger than the sum of its proper divisors (6675131).

20025381 is an equidigital number, since it uses as much as digits as its factorization.

20025381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6675130.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 20025381 is about 4474.9727373471. The cubic root of 20025381 is about 271.5565375103.

Adding to 20025381 its reverse (18352002), we get a palindrome (38377383).

The spelling of 20025381 in words is "twenty million, twenty-five thousand, three hundred eighty-one".