20355218337 has 16 divisors (see below), whose sum is σ = 27415065600. Its totient is φ = 13432867152.

The previous prime is 20355218333. The next prime is 20355218383. The reversal of 20355218337 is 73381255302.

It is not a de Polignac number, because 20355218337 - 2² = 20355218333 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20355218295 and 20355218304.

It is not an unprimeable number, because it can be changed into a prime (20355218333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 821788 + ... + 846194.

It is an arithmetic number, because the mean of its divisors is an integer number (1713441600).

Almost surely, 2^20355218337 is an apocalyptic number.

It is an amenable number.

20355218337 is a deficient number, since it is larger than the sum of its proper divisors (7059847263).

20355218337 is a wasteful number, since it uses less digits than its factorization.

20355218337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27212.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 20355218337 in words is "twenty billion, three hundred fifty-five million, two hundred eighteen thousand, three hundred thirty-seven".