20625267091 has 16 divisors (see below), whose sum is σ = 24345957888. Its totient is φ = 17225863200.

The previous prime is 20625267083. The next prime is 20625267109. The reversal of 20625267091 is 19076252602.

It is not a de Polignac number, because 20625267091 - 2³ = 20625267083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20625267071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311611 + ... + 371956.

It is an arithmetic number, because the mean of its divisors is an integer number (1521622368).

Almost surely, 2^20625267091 is an apocalyptic number.

20625267091 is a deficient number, since it is larger than the sum of its proper divisors (3720690797).

20625267091 is a wasteful number, since it uses less digits than its factorization.

20625267091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683802.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 20625267091 in words is "twenty billion, six hundred twenty-five million, two hundred sixty-seven thousand, ninety-one".