21462011 has 4 divisors (see below), whose sum is σ = 21502224. Its totient is φ = 21421800.

The previous prime is 21461989. The next prime is 21462019. The reversal of 21462011 is 11026412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21462011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21462019) 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, 19295 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (5375556).

Almost surely, 2^21462011 is an apocalyptic number.

21462011 is a deficient number, since it is larger than the sum of its proper divisors (40213).

21462011 is an equidigital number, since it uses as much as digits as its factorization.

21462011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40212.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 21462011 is about 4632.7109773868. The cubic root of 21462011 is about 277.9010180197.

Adding to 21462011 its reverse (11026412), we get a palindrome (32488423).

The spelling of 21462011 in words is "twenty-one million, four hundred sixty-two thousand, eleven".