21340572011 has 8 divisors (see below), whose sum is σ = 24292825344. Its totient is φ = 18557018920.

The previous prime is 21340571969. The next prime is 21340572013. The reversal of 21340572011 is 11027504312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21340572011 - 2²⁶ = 21273463147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21340572013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42174791 + ... + 42175296.

It is an arithmetic number, because the mean of its divisors is an integer number (3036603168).

Almost surely, 2^21340572011 is an apocalyptic number.

21340572011 is a deficient number, since it is larger than the sum of its proper divisors (2952253333).

21340572011 is a wasteful number, since it uses less digits than its factorization.

21340572011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84350121.

The product of its (nonzero) digits is 1680, while the sum is 26.

The spelling of 21340572011 in words is "twenty-one billion, three hundred forty million, five hundred seventy-two thousand, eleven".