20291021110 has 16 divisors (see below), whose sum is σ = 36526525632. Its totient is φ = 8115811200.

The previous prime is 20291021083. The next prime is 20291021117. The reversal of 20291021110 is 1112019202.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20291021117) 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 7 ways as a sum of consecutive naturals, for example, 84115 + ... + 218305.

It is an arithmetic number, because the mean of its divisors is an integer number (2282907852).

Almost surely, 2^20291021110 is an apocalyptic number.

20291021110 is a deficient number, since it is larger than the sum of its proper divisors (16235504522).

20291021110 is a wasteful number, since it uses less digits than its factorization.

20291021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149319.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 20291021110 in words is "twenty billion, two hundred ninety-one million, twenty-one thousand, one hundred ten".