20202691011 has 4 divisors (see below), whose sum is σ = 26936921352. Its totient is φ = 13468460672.

The previous prime is 20202690971. The next prime is 20202691027. The reversal of 20202691011 is 11019620202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20202691011 - 2¹⁷ = 20202559939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20202651011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3367115166 + ... + 3367115171.

It is an arithmetic number, because the mean of its divisors is an integer number (6734230338).

Almost surely, 2^20202691011 is an apocalyptic number.

20202691011 is a deficient number, since it is larger than the sum of its proper divisors (6734230341).

20202691011 is an equidigital number, since it uses as much as digits as its factorization.

20202691011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6734230340.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 20202691011 in words is "twenty billion, two hundred two million, six hundred ninety-one thousand, eleven".