21060782 has 16 divisors (see below), whose sum is σ = 32173200. Its totient is φ = 10338240.

The previous prime is 21060763. The next prime is 21060829. The reversal of 21060782 is 28706012.

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, 31532 + ... + 32192.

It is an arithmetic number, because the mean of its divisors is an integer number (2010825).

Almost surely, 2^21060782 is an apocalyptic number.

21060782 is a deficient number, since it is larger than the sum of its proper divisors (11112418).

21060782 is a wasteful number, since it uses less digits than its factorization.

21060782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 21060782 is about 4589.2027630080. The cubic root of 21060782 is about 276.1583404950.

Adding to 21060782 its reverse (28706012), we get a palindrome (49766794).

The spelling of 21060782 in words is "twenty-one million, sixty thousand, seven hundred eighty-two".