20342581073 has 4 divisors (see below), whose sum is σ = 20343137280. Its totient is φ = 20342024868.

The previous prime is 20342581003. The next prime is 20342581079. The reversal of 20342581073 is 37018524302.

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 a cyclic number.

It is not a de Polignac number, because 20342581073 - 2¹² = 20342576977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20342581079) 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, 219065 + ... + 297782.

It is an arithmetic number, because the mean of its divisors is an integer number (5085784320).

Almost surely, 2^20342581073 is an apocalyptic number.

It is an amenable number.

20342581073 is a deficient number, since it is larger than the sum of its proper divisors (556207).

20342581073 is an equidigital number, since it uses as much as digits as its factorization.

20342581073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 556206.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20342581073 in words is "twenty billion, three hundred forty-two million, five hundred eighty-one thousand, seventy-three".