21077932 has 12 divisors (see below), whose sum is σ = 37437400. Its totient is φ = 10381536.

The previous prime is 21077929. The next prime is 21077951. The reversal of 21077932 is 23977012.

It is a junction number, because it is equal to n+sod(n) for n = 21077894 and 21077903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39057 + ... + 39592.

Almost surely, 2^21077932 is an apocalyptic number.

It is an amenable number.

21077932 is a deficient number, since it is larger than the sum of its proper divisors (16359468).

21077932 is a wasteful number, since it uses less digits than its factorization.

21077932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78720 (or 78718 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 21077932 is about 4591.0708990387. The cubic root of 21077932 is about 276.2332796334.

The spelling of 21077932 in words is "twenty-one million, seventy-seven thousand, nine hundred thirty-two".