21677132 has 12 divisors (see below), whose sum is σ = 39584496. Its totient is φ = 10367280.

The previous prime is 21677093. The next prime is 21677137. The reversal of 21677132 is 23177612.

It is a junction number, because it is equal to n+sod(n) for n = 21677095 and 21677104.

It is not an unprimeable number, because it can be changed into a prime (21677137) 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, 117719 + ... + 117902.

It is an arithmetic number, because the mean of its divisors is an integer number (3298708).

Almost surely, 2^21677132 is an apocalyptic number.

It is an amenable number.

21677132 is a deficient number, since it is larger than the sum of its proper divisors (17907364).

21677132 is a wasteful number, since it uses less digits than its factorization.

21677132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235648 (or 235646 counting only the distinct ones).

The product of its digits is 3528, while the sum is 29.

The square root of 21677132 is about 4655.8707026721. The cubic root of 21677132 is about 278.8264316139.

The spelling of 21677132 in words is "twenty-one million, six hundred seventy-seven thousand, one hundred thirty-two".