20000291212 has 24 divisors (see below), whose sum is σ = 38642409792. Its totient is φ = 8981509200.

The previous prime is 20000291183. The next prime is 20000291219. The reversal of 20000291212 is 21219200002.

It is a self number, because there is not a number n which added to its sum of digits gives 20000291212.

It is not an unprimeable number, because it can be changed into a prime (20000291219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2734614 + ... + 2741917.

It is an arithmetic number, because the mean of its divisors is an integer number (1610100408).

Almost surely, 2^20000291212 is an apocalyptic number.

20000291212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20000291212 is a deficient number, since it is larger than the sum of its proper divisors (18642118580).

20000291212 is a wasteful number, since it uses less digits than its factorization.

20000291212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476629 (or 5476627 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20000291212 its reverse (21219200002), we get a palindrome (41219491214).

The spelling of 20000291212 in words is "twenty billion, two hundred ninety-one thousand, two hundred twelve".