20994370 has 32 divisors (see below), whose sum is σ = 38854656. Its totient is φ = 8164800.

The previous prime is 20994367. The next prime is 20994433. The reversal of 20994370 is 7349902.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 77335 + ... + 77605.

It is an arithmetic number, because the mean of its divisors is an integer number (1214208).

Almost surely, 2^20994370 is an apocalyptic number.

20994370 is a deficient number, since it is larger than the sum of its proper divisors (17860286).

20994370 is a wasteful number, since it uses less digits than its factorization.

20994370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 20994370 is about 4581.9613704177. The cubic root of 20994370 is about 275.8677602867.

The spelling of 20994370 in words is "twenty million, nine hundred ninety-four thousand, three hundred seventy".