20210840718 has 32 divisors (see below), whose sum is σ = 41830054560. Its totient is φ = 6502379520.

The previous prime is 20210840651. The next prime is 20210840719. The reversal of 20210840718 is 81704801202.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210840719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 524446 + ... + 561662.

It is an arithmetic number, because the mean of its divisors is an integer number (1307189205).

Almost surely, 2^20210840718 is an apocalyptic number.

20210840718 is an abundant number, since it is smaller than the sum of its proper divisors (21619213842).

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

20210840718 is a wasteful number, since it uses less digits than its factorization.

20210840718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40372.

The product of its (nonzero) digits is 7168, while the sum is 33.

The spelling of 20210840718 in words is "twenty billion, two hundred ten million, eight hundred forty thousand, seven hundred eighteen".