21361358 has 16 divisors (see below), whose sum is σ = 34642320. Its totient is φ = 9844416.

The previous prime is 21361303. The next prime is 21361391. The reversal of 21361358 is 85316312.

It is a self number, because there is not a number n which added to its sum of digits gives 21361358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6191 + ... + 9002.

It is an arithmetic number, because the mean of its divisors is an integer number (2165145).

Almost surely, 2^21361358 is an apocalyptic number.

21361358 is a deficient number, since it is larger than the sum of its proper divisors (13280962).

21361358 is a wasteful number, since it uses less digits than its factorization.

21361358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251.

The product of its digits is 4320, while the sum is 29.

The square root of 21361358 is about 4621.8349170000. The cubic root of 21361358 is about 277.4659017162.

The spelling of 21361358 in words is "twenty-one million, three hundred sixty-one thousand, three hundred fifty-eight".