20830916 has 48 divisors (see below), whose sum is σ = 42456960. Its totient is φ = 8870400.

The previous prime is 20830907. The next prime is 20830937. The reversal of 20830916 is 61903802.

It is a super-2 number, since 2×20830916² = 867854122798112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29366 + ... + 30066.

It is an arithmetic number, because the mean of its divisors is an integer number (884520).

Almost surely, 2^20830916 is an apocalyptic number.

It is an amenable number.

20830916 is an abundant number, since it is smaller than the sum of its proper divisors (21626044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20830916 is a wasteful number, since it uses less digits than its factorization.

20830916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 20830916 is about 4564.0898325953. The cubic root of 20830916 is about 275.1499611845.

The spelling of 20830916 in words is "twenty million, eight hundred thirty thousand, nine hundred sixteen".