20453719 has 12 divisors (see below), whose sum is σ = 24213448. Its totient is φ = 17162640.

The previous prime is 20453717. The next prime is 20453743. The reversal of 20453719 is 91735402.

It is not a de Polignac number, because 20453719 - 2¹ = 20453717 is a prime.

It is a super-2 number, since 2×20453719² = 836709241861922, 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 (20453717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4929 + ... + 8074.

Almost surely, 2^20453719 is an apocalyptic number.

20453719 is a deficient number, since it is larger than the sum of its proper divisors (3759729).

20453719 is a wasteful number, since it uses less digits than its factorization.

20453719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13038 (or 13027 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 20453719 is about 4522.5787997557. The cubic root of 20453719 is about 273.4790704406.

The spelling of 20453719 in words is "twenty million, four hundred fifty-three thousand, seven hundred nineteen".