20530313851 has 8 divisors (see below), whose sum is σ = 20556051264. Its totient is φ = 20504594880.

The previous prime is 20530313821. The next prime is 20530313863. The reversal of 20530313851 is 15831303502.

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 20530313851 - 2⁷ = 20530313723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20530313821) 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, 4469566 + ... + 4474156.

It is an arithmetic number, because the mean of its divisors is an integer number (2569506408).

Almost surely, 2^20530313851 is an apocalyptic number.

20530313851 is a deficient number, since it is larger than the sum of its proper divisors (25737413).

20530313851 is a wasteful number, since it uses less digits than its factorization.

20530313851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9221.

The product of its (nonzero) digits is 10800, while the sum is 31.

The spelling of 20530313851 in words is "twenty billion, five hundred thirty million, three hundred thirteen thousand, eight hundred fifty-one".