21461011 has 8 divisors (see below), whose sum is σ = 25213104. Its totient is φ = 18009120.

The previous prime is 21460993. The next prime is 21461023. The reversal of 21461011 is 11016412.

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

It is a cyclic number.

It is not a de Polignac number, because 21461011 - 2⁵ = 21460979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21461611) 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, 74896 + ... + 75181.

It is an arithmetic number, because the mean of its divisors is an integer number (3151638).

Almost surely, 2^21461011 is an apocalyptic number.

21461011 is a deficient number, since it is larger than the sum of its proper divisors (3752093).

21461011 is a wasteful number, since it uses less digits than its factorization.

21461011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150101.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 21461011 is about 4632.6030479634. The cubic root of 21461011 is about 277.8967017834.

Adding to 21461011 its reverse (11016412), we get a palindrome (32477423).

The spelling of 21461011 in words is "twenty-one million, four hundred sixty-one thousand, eleven".