20357203247 has 8 divisors (see below), whose sum is σ = 20621009136. Its totient is φ = 20093838912.

The previous prime is 20357203219. The next prime is 20357203277. The reversal of 20357203247 is 74230275302.

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 20357203247 - 2⁶ = 20357203183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357203277) 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, 17078 + ... + 202499.

It is an arithmetic number, because the mean of its divisors is an integer number (2577626142).

Almost surely, 2^20357203247 is an apocalyptic number.

20357203247 is a deficient number, since it is larger than the sum of its proper divisors (263805889).

20357203247 is a wasteful number, since it uses less digits than its factorization.

20357203247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220777.

The product of its (nonzero) digits is 70560, while the sum is 35.

Adding to 20357203247 its reverse (74230275302), we get a palindrome (94587478549).

The spelling of 20357203247 in words is "twenty billion, three hundred fifty-seven million, two hundred three thousand, two hundred forty-seven".