20850357243 has 8 divisors (see below), whose sum is σ = 27806900800. Its totient is φ = 13897025928.

The previous prime is 20850357221. The next prime is 20850357257. The reversal of 20850357243 is 34275305802.

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

It is a de Polignac number, because none of the positive numbers 2^k-20850357243 is a prime.

It is a super-2 number, since 2×20850357243² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20850357643) 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, 787873 + ... + 813906.

It is an arithmetic number, because the mean of its divisors is an integer number (3475862600).

Almost surely, 2^20850357243 is an apocalyptic number.

20850357243 is a deficient number, since it is larger than the sum of its proper divisors (6956543557).

20850357243 is a wasteful number, since it uses less digits than its factorization.

20850357243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606121.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 20850357243 in words is "twenty billion, eight hundred fifty million, three hundred fifty-seven thousand, two hundred forty-three".