20349148218 has 32 divisors (see below), whose sum is σ = 46530363264. Its totient is φ = 5811789312.

The previous prime is 20349148217. The next prime is 20349148241. The reversal of 20349148218 is 81284194302.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20349148218.

It is not an unprimeable number, because it can be changed into a prime (20349148217) 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, 17346 + ... + 202482.

It is an arithmetic number, because the mean of its divisors is an integer number (1454073852).

Almost surely, 2^20349148218 is an apocalyptic number.

20349148218 is an abundant number, since it is smaller than the sum of its proper divisors (26181215046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20349148218 is a wasteful number, since it uses less digits than its factorization.

20349148218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187766.

The product of its (nonzero) digits is 110592, while the sum is 42.

The spelling of 20349148218 in words is "twenty billion, three hundred forty-nine million, one hundred forty-eight thousand, two hundred eighteen".