21061362 has 32 divisors (see below), whose sum is σ = 49444992. Its totient is φ = 5854464.

The previous prime is 21061361. The next prime is 21061363. The reversal of 21061362 is 26316012.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21061361) and next prime (21061363).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21061361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5223 + ... + 8330.

It is an arithmetic number, because the mean of its divisors is an integer number (1545156).

Almost surely, 2^21061362 is an apocalyptic number.

21061362 is an abundant number, since it is smaller than the sum of its proper divisors (28383630).

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

21061362 is a wasteful number, since it uses less digits than its factorization.

21061362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13602.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21061362 is about 4589.2659543766. The cubic root of 21061362 is about 276.1608755444.

Adding to 21061362 its reverse (26316012), we get a palindrome (47377374).

The spelling of 21061362 in words is "twenty-one million, sixty-one thousand, three hundred sixty-two".