20290909111 has 8 divisors (see below), whose sum is σ = 22137464448. Its totient is φ = 18444675000.

The previous prime is 20290909099. The next prime is 20290909157. The reversal of 20290909111 is 11190909202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20290909111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20290909411) 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, 62886 + ... + 211036.

It is an arithmetic number, because the mean of its divisors is an integer number (2767183056).

Almost surely, 2^20290909111 is an apocalyptic number.

20290909111 is a deficient number, since it is larger than the sum of its proper divisors (1846555337).

20290909111 is a wasteful number, since it uses less digits than its factorization.

20290909111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160613.

The product of its (nonzero) digits is 2916, while the sum is 34.

Subtracting from 20290909111 its reverse (11190909202), we obtain a palindrome (9099999909).

The spelling of 20290909111 in words is "twenty billion, two hundred ninety million, nine hundred nine thousand, one hundred eleven".