21361014 has 24 divisors (see below), whose sum is σ = 47157552. Its totient is φ = 6985680.

The previous prime is 21361013. The next prime is 21361031. The reversal of 21361014 is 41016312.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21361013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10242 + ... + 12149.

It is an arithmetic number, because the mean of its divisors is an integer number (1964898).

Almost surely, 2^21361014 is an apocalyptic number.

21361014 is an abundant number, since it is smaller than the sum of its proper divisors (25796538).

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

21361014 is a wasteful number, since it uses less digits than its factorization.

21361014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22452 (or 22449 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 21361014 is about 4621.7977021934. The cubic root of 21361014 is about 277.4644122856.

Adding to 21361014 its reverse (41016312), we get a palindrome (62377326).

The spelling of 21361014 in words is "twenty-one million, three hundred sixty-one thousand, fourteen".