20259442893 has 4 divisors (see below), whose sum is σ = 27012590528. Its totient is φ = 13506295260.

The previous prime is 20259442883. The next prime is 20259442897. The reversal of 20259442893 is 39824495202.

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 20259442893 - 2²² = 20255248589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20259442897) 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, 3376573813 + ... + 3376573818.

It is an arithmetic number, because the mean of its divisors is an integer number (6753147632).

Almost surely, 2^20259442893 is an apocalyptic number.

It is an amenable number.

20259442893 is a deficient number, since it is larger than the sum of its proper divisors (6753147635).

20259442893 is an equidigital number, since it uses as much as digits as its factorization.

20259442893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753147634.

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 20259442893 in words is "twenty billion, two hundred fifty-nine million, four hundred forty-two thousand, eight hundred ninety-three".