20091009291 has 8 divisors (see below), whose sum is σ = 27293446800. Its totient is φ = 13141288992.

The previous prime is 20091009251. The next prime is 20091009347. The reversal of 20091009291 is 19290019002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20091009291 - 2¹⁸ = 20090747147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20091009251) 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, 63179116 + ... + 63179433.

It is an arithmetic number, because the mean of its divisors is an integer number (3411680850).

Almost surely, 2^20091009291 is an apocalyptic number.

20091009291 is a deficient number, since it is larger than the sum of its proper divisors (7202437509).

20091009291 is a wasteful number, since it uses less digits than its factorization.

20091009291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126358605.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 20091009291 in words is "twenty billion, ninety-one million, nine thousand, two hundred ninety-one".