20281057205 has 32 divisors (see below), whose sum is σ = 26049703680. Its totient is φ = 15104517120.

The previous prime is 20281057169. The next prime is 20281057259. The reversal of 20281057205 is 50275018202.

It is a happy number.

It is not a de Polignac number, because 20281057205 - 2¹² = 20281053109 is a prime.

It is a super-2 number, since 2×20281057205² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6734150 + ... + 6737160.

It is an arithmetic number, because the mean of its divisors is an integer number (814053240).

Almost surely, 2^20281057205 is an apocalyptic number.

It is an amenable number.

20281057205 is a deficient number, since it is larger than the sum of its proper divisors (5768646475).

20281057205 is a wasteful number, since it uses less digits than its factorization.

20281057205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3869.

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 20281057205 in words is "twenty billion, two hundred eighty-one million, fifty-seven thousand, two hundred five".