11427670021 has 4 divisors (see below), whose sum is σ = 11453701600. Its totient is φ = 11401638444.

The previous prime is 11427669997. The next prime is 11427670031. The reversal of 11427670021 is 12007672411.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11427670021 - 2⁵ = 11427669989 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 (11427670031) 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, 13015131 + ... + 13016008.

It is an arithmetic number, because the mean of its divisors is an integer number (2863425400).

Almost surely, 2^11427670021 is an apocalyptic number.

It is an amenable number.

11427670021 is a deficient number, since it is larger than the sum of its proper divisors (26031579).

11427670021 is an equidigital number, since it uses as much as digits as its factorization.

11427670021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26031578.

The product of its (nonzero) digits is 4704, while the sum is 31.

The spelling of 11427670021 in words is "eleven billion, four hundred twenty-seven million, six hundred seventy thousand, twenty-one".