20412919 has 4 divisors (see below), whose sum is σ = 20460496. Its totient is φ = 20365344.

The previous prime is 20412913. The next prime is 20412923. The reversal of 20412919 is 91921402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91921402 = 2 ⋅45960701.

It is a cyclic number.

It is not a de Polignac number, because 20412919 - 2¹⁷ = 20281847 is a prime.

It is a super-2 number, since 2×20412919² = 833374524201122, 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 (20412913) 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, 23139 + ... + 24004.

It is an arithmetic number, because the mean of its divisors is an integer number (5115124).

Almost surely, 2^20412919 is an apocalyptic number.

20412919 is a deficient number, since it is larger than the sum of its proper divisors (47577).

20412919 is an equidigital number, since it uses as much as digits as its factorization.

20412919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47576.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 20412919 is about 4518.0658472404. The cubic root of 20412919 is about 273.2971088553.

The spelling of 20412919 in words is "twenty million, four hundred twelve thousand, nine hundred nineteen".