20205042051 has 8 divisors (see below), whose sum is σ = 27025041744. Its totient is φ = 13427535200.

The previous prime is 20205042037. The next prime is 20205042059. The reversal of 20205042051 is 15024050202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20205042051 - 2²³ = 20196653443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20205042059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10622100 + ... + 10624001.

It is an arithmetic number, because the mean of its divisors is an integer number (3378130218).

Almost surely, 2^20205042051 is an apocalyptic number.

20205042051 is a deficient number, since it is larger than the sum of its proper divisors (6819999693).

20205042051 is a wasteful number, since it uses less digits than its factorization.

20205042051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21246421.

The product of its (nonzero) digits is 800, while the sum is 21.

Adding to 20205042051 its reverse (15024050202), we get a palindrome (35229092253).

The spelling of 20205042051 in words is "twenty billion, two hundred five million, forty-two thousand, fifty-one".