21760124 has 12 divisors (see below), whose sum is σ = 38129784. Its totient is φ = 10865904.

The previous prime is 21760099. The next prime is 21760127. The reversal of 21760124 is 42106712.

It is a self number, because there is not a number n which added to its sum of digits gives 21760124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21760127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407 + ... + 6609.

It is an arithmetic number, because the mean of its divisors is an integer number (3177482).

Almost surely, 2^21760124 is an apocalyptic number.

It is an amenable number.

21760124 is a deficient number, since it is larger than the sum of its proper divisors (16369660).

21760124 is a wasteful number, since it uses less digits than its factorization.

21760124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7084 (or 7082 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 21760124 is about 4664.7748069977. The cubic root of 21760124 is about 279.1818121829.

Adding to 21760124 its reverse (42106712), we get a palindrome (63866836).

The spelling of 21760124 in words is "twenty-one million, seven hundred sixty thousand, one hundred twenty-four".