21061014 has 32 divisors (see below), whose sum is σ = 46013184. Its totient is φ = 6387360.

The previous prime is 21061009. The next prime is 21061021. The reversal of 21061014 is 41016012.

It is a junction number, because it is equal to n+sod(n) for n = 21060984 and 21061002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3637 + ... + 7439.

It is an arithmetic number, because the mean of its divisors is an integer number (1437912).

Almost surely, 2^21061014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21061014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23006592).

21061014 is an abundant number, since it is smaller than the sum of its proper divisors (24952170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21061014 is a wasteful number, since it uses less digits than its factorization.

21061014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 21061014 is about 4589.2280396598. The cubic root of 21061014 is about 276.1593545204.

Adding to 21061014 its reverse (41016012), we get a palindrome (62077026).

The spelling of 21061014 in words is "twenty-one million, sixty-one thousand, fourteen".