21428592767 has 4 divisors (see below), whose sum is σ = 21428965680. Its totient is φ = 21428219856.

The previous prime is 21428592751. The next prime is 21428592793. The reversal of 21428592767 is 76729582412.

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 21428592767 - 2⁴ = 21428592751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21428592707) 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, 80003 + ... + 221940.

It is an arithmetic number, because the mean of its divisors is an integer number (5357241420).

Almost surely, 2^21428592767 is an apocalyptic number.

21428592767 is a deficient number, since it is larger than the sum of its proper divisors (372913).

21428592767 is an equidigital number, since it uses as much as digits as its factorization.

21428592767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372912.

The product of its digits is 3386880, while the sum is 53.

The spelling of 21428592767 in words is "twenty-one billion, four hundred twenty-eight million, five hundred ninety-two thousand, seven hundred sixty-seven".