21034277 has 12 divisors (see below), whose sum is σ = 23314368. Its totient is φ = 18961800.

The previous prime is 21034261. The next prime is 21034297. The reversal of 21034277 is 77243012.

It is not a de Polignac number, because 21034277 - 2⁴ = 21034261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21034297) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15188 + ... + 16514.

It is an arithmetic number, because the mean of its divisors is an integer number (1942864).

Almost surely, 2^21034277 is an apocalyptic number.

It is an amenable number.

21034277 is a deficient number, since it is larger than the sum of its proper divisors (2280091).

21034277 is a wasteful number, since it uses less digits than its factorization.

21034277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480 (or 1469 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21034277 is about 4586.3140973989. The cubic root of 21034277 is about 276.0424434132.

Adding to 21034277 its reverse (77243012), we get a palindrome (98277289).

The spelling of 21034277 in words is "twenty-one million, thirty-four thousand, two hundred seventy-seven".