20919146711 has 4 divisors (see below), whose sum is σ = 20923238400. Its totient is φ = 20915055024.

The previous prime is 20919146707. The next prime is 20919146741. The reversal of 20919146711 is 11764191902.

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 20919146711 - 2² = 20919146707 is a prime.

It is a super-2 number, since 2×20919146711² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20919146741) 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, 2038166 + ... + 2048403.

It is an arithmetic number, because the mean of its divisors is an integer number (5230809600).

Almost surely, 2^20919146711 is an apocalyptic number.

20919146711 is a deficient number, since it is larger than the sum of its proper divisors (4091689).

20919146711 is an equidigital number, since it uses as much as digits as its factorization.

20919146711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4091688.

The product of its (nonzero) digits is 27216, while the sum is 41.

The spelling of 20919146711 in words is "twenty billion, nine hundred nineteen million, one hundred forty-six thousand, seven hundred eleven".