20994328 has 8 divisors (see below), whose sum is σ = 39364380. Its totient is φ = 10497160.

The previous prime is 20994319. The next prime is 20994343. The reversal of 20994328 is 82349902.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1312138 + ... + 1312153.

Almost surely, 2^20994328 is an apocalyptic number.

It is an amenable number.

20994328 is a deficient number, since it is larger than the sum of its proper divisors (18370052).

20994328 is a wasteful number, since it uses less digits than its factorization.

20994328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624297 (or 2624293 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 20994328 is about 4581.9567872253. The cubic root of 20994328 is about 275.8675763254.

The spelling of 20994328 in words is "twenty million, nine hundred ninety-four thousand, three hundred twenty-eight".