20994371 has 8 divisors (see below), whose sum is σ = 22355424. Its totient is φ = 19647360.

The previous prime is 20994367. The next prime is 20994433. The reversal of 20994371 is 17349902.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20994371 - 2² = 20994367 is a prime.

It is a super-2 number, since 2×20994371² = 881527227371282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20994271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335 + ... + 6488.

It is an arithmetic number, because the mean of its divisors is an integer number (2794428).

Almost surely, 2^20994371 is an apocalyptic number.

20994371 is a deficient number, since it is larger than the sum of its proper divisors (1361053).

20994371 is a wasteful number, since it uses less digits than its factorization.

20994371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7021.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 20994371 is about 4581.9614795413. The cubic root of 20994371 is about 275.8677646667.

The spelling of 20994371 in words is "twenty million, nine hundred ninety-four thousand, three hundred seventy-one".