21460036 has 24 divisors (see below), whose sum is σ = 40907160. Its totient is φ = 9791232.

The previous prime is 21460007. The next prime is 21460057. The reversal of 21460036 is 63006412.

It can be written as a sum of positive squares in 4 ways, for example, as 207936 + 21252100 = 456^2 + 4610^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21459989 and 21460016.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2310 + ... + 6946.

It is an arithmetic number, because the mean of its divisors is an integer number (1704465).

Almost surely, 2^21460036 is an apocalyptic number.

21460036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21460036 is a deficient number, since it is larger than the sum of its proper divisors (19447124).

21460036 is a wasteful number, since it uses less digits than its factorization.

21460036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4743 (or 4741 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 21460036 is about 4632.4978143546. The cubic root of 21460036 is about 277.8924933239.

Adding to 21460036 its reverse (63006412), we get a palindrome (84466448).

The spelling of 21460036 in words is "twenty-one million, four hundred sixty thousand, thirty-six".