20419243091 has 32 divisors (see below), whose sum is σ = 23099123712. Its totient is φ = 17921710080.

The previous prime is 20419243087. The next prime is 20419243127. The reversal of 20419243091 is 19034291402.

It is not a de Polignac number, because 20419243091 - 2² = 20419243087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20419243081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6454076 + ... + 6457238.

It is an arithmetic number, because the mean of its divisors is an integer number (721847616).

Almost surely, 2^20419243091 is an apocalyptic number.

20419243091 is a deficient number, since it is larger than the sum of its proper divisors (2679880621).

20419243091 is a wasteful number, since it uses less digits than its factorization.

20419243091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483.

The product of its (nonzero) digits is 15552, while the sum is 35.

The spelling of 20419243091 in words is "twenty billion, four hundred nineteen million, two hundred forty-three thousand, ninety-one".