20994830 has 16 divisors (see below), whose sum is σ = 40014000. Its totient is φ = 7903872.

The previous prime is 20994821. The next prime is 20994851. The reversal of 20994830 is 3849902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61580 + ... + 61919.

It is an arithmetic number, because the mean of its divisors is an integer number (2500875).

Almost surely, 2^20994830 is an apocalyptic number.

20994830 is a deficient number, since it is larger than the sum of its proper divisors (19019170).

20994830 is a wasteful number, since it uses less digits than its factorization.

20994830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123523.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 20994830 is about 4582.0115669867. The cubic root of 20994830 is about 275.8697750847.

The spelling of 20994830 in words is "twenty million, nine hundred ninety-four thousand, eight hundred thirty".