20871245355 has 32 divisors (see below), whose sum is σ = 35372179008. Its totient is φ = 10472448000.

The previous prime is 20871245333. The next prime is 20871245359. The reversal of 20871245355 is 55354217802.

It is not a de Polignac number, because 20871245355 - 2¹⁷ = 20871114283 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20871245359) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 699645 + ... + 728865.

It is an arithmetic number, because the mean of its divisors is an integer number (1105380594).

Almost surely, 2^20871245355 is an apocalyptic number.

20871245355 is a deficient number, since it is larger than the sum of its proper divisors (14500933653).

20871245355 is a wasteful number, since it uses less digits than its factorization.

20871245355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32047.

The product of its (nonzero) digits is 336000, while the sum is 42.

The spelling of 20871245355 in words is "twenty billion, eight hundred seventy-one million, two hundred forty-five thousand, three hundred fifty-five".