20205708893 has 16 divisors (see below), whose sum is σ = 20893017600. Its totient is φ = 19533571200.

The previous prime is 20205708889. The next prime is 20205708899. The reversal of 20205708893 is 39880750202.

It is a cyclic number.

It is not a de Polignac number, because 20205708893 - 2² = 20205708889 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 (20205708899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 710243 + ... + 738143.

It is an arithmetic number, because the mean of its divisors is an integer number (1305813600).

Almost surely, 2^20205708893 is an apocalyptic number.

It is an amenable number.

20205708893 is a deficient number, since it is larger than the sum of its proper divisors (687308707).

20205708893 is a wasteful number, since it uses less digits than its factorization.

20205708893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28172.

The product of its (nonzero) digits is 241920, while the sum is 44.

The spelling of 20205708893 in words is "twenty billion, two hundred five million, seven hundred eight thousand, eight hundred ninety-three".