20342919 has 4 divisors (see below), whose sum is σ = 27123896. Its totient is φ = 13561944.

The previous prime is 20342911. The next prime is 20342921. The reversal of 20342919 is 91924302.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20342919 - 2³ = 20342911 is a prime.

It is a super-2 number, since 2×20342919² = 827668706881122, 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 (20342911) 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, 3390484 + ... + 3390489.

It is an arithmetic number, because the mean of its divisors is an integer number (6780974).

Almost surely, 2^20342919 is an apocalyptic number.

20342919 is a deficient number, since it is larger than the sum of its proper divisors (6780977).

20342919 is an equidigital number, since it uses as much as digits as its factorization.

20342919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6780976.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20342919 is about 4510.3125168884. The cubic root of 20342919 is about 272.9843541866.

The spelling of 20342919 in words is "twenty million, three hundred forty-two thousand, nine hundred nineteen".