21924076 has 6 divisors (see below), whose sum is σ = 38367140. Its totient is φ = 10962036.

The previous prime is 21924073. The next prime is 21924107. The reversal of 21924076 is 67042912.

It is not an unprimeable number, because it can be changed into a prime (21924073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2740506 + ... + 2740513.

Almost surely, 2^21924076 is an apocalyptic number.

It is an amenable number.

21924076 is a deficient number, since it is larger than the sum of its proper divisors (16443064).

21924076 is a wasteful number, since it uses less digits than its factorization.

21924076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5481023 (or 5481021 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 21924076 is about 4682.3152392807. The cubic root of 21924076 is about 279.8812251335.

Adding to 21924076 its reverse (67042912), we get a palindrome (88966988).

The spelling of 21924076 in words is "twenty-one million, nine hundred twenty-four thousand, seventy-six".