20883181372157 has 4 divisors (see below), whose sum is σ = 22489579939260. Its totient is φ = 19276782805056.

The previous prime is 20883181372129. The next prime is 20883181372213. The reversal of 20883181372157 is 75127318138802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8651192746681 + 12231988625476 = 2941291^2 + 3497426^2 .

It is a cyclic number.

It is not a de Polignac number, because 20883181372157 - 2²⁰ = 20883180323581 is a prime.

It is a super-2 number, since 2×20883181372157² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20883181372117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803199283532 + ... + 803199283557.

It is an arithmetic number, because the mean of its divisors is an integer number (5622394984815).

Almost surely, 2^{20883181372157} is an apocalyptic number.

It is an amenable number.

20883181372157 is a deficient number, since it is larger than the sum of its proper divisors (1606398567103).

20883181372157 is a wasteful number, since it uses less digits than its factorization.

20883181372157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606398567102.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The spelling of 20883181372157 in words is "twenty trillion, eight hundred eighty-three billion, one hundred eighty-one million, three hundred seventy-two thousand, one hundred fifty-seven".