21760034 has 24 divisors (see below), whose sum is σ = 35839908. Its totient is φ = 9873920.

The previous prime is 21760031. The next prime is 21760069. The reversal of 21760034 is 43006712.

It can be written as a sum of positive squares in 6 ways, for example, as 6744409 + 15015625 = 2597^2 + 3875^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21759991 and 21760009.

It is not an unprimeable number, because it can be changed into a prime (21760031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28214 + ... + 28974.

Almost surely, 2^21760034 is an apocalyptic number.

21760034 is a deficient number, since it is larger than the sum of its proper divisors (14079874).

21760034 is a wasteful number, since it uses less digits than its factorization.

21760034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 809 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 21760034 is about 4664.7651602198. The cubic root of 21760034 is about 279.1814272832.

Adding to 21760034 its reverse (43006712), we get a palindrome (64766746).

It can be divided in two parts, 217600 and 34, that multiplied together give a square (7398400 = 2720²).

The spelling of 21760034 in words is "twenty-one million, seven hundred sixty thousand, thirty-four".