20720201242 has 64 divisors (see below), whose sum is σ = 35587641600. Its totient is φ = 8978296320.

The previous prime is 20720201221. The next prime is 20720201267. The reversal of 20720201242 is 24210202702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11097193 + ... + 11099059.

It is an arithmetic number, because the mean of its divisors is an integer number (556056900).

Almost surely, 2^20720201242 is an apocalyptic number.

20720201242 is a deficient number, since it is larger than the sum of its proper divisors (14867440358).

20720201242 is a wasteful number, since it uses less digits than its factorization.

20720201242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311.

The product of its (nonzero) digits is 896, while the sum is 22.

Adding to 20720201242 its reverse (24210202702), we get a palindrome (44930403944).

The spelling of 20720201242 in words is "twenty billion, seven hundred twenty million, two hundred one thousand, two hundred forty-two".