20294391 has 8 divisors (see below), whose sum is σ = 29140720. Its totient is φ = 12488832.

The previous prime is 20294387. The next prime is 20294401. The reversal of 20294391 is 19349202.

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

It is not a de Polignac number, because 20294391 - 2² = 20294387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20294321) 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, 260146 + ... + 260223.

It is an arithmetic number, because the mean of its divisors is an integer number (3642590).

Almost surely, 2^20294391 is an apocalyptic number.

20294391 is a deficient number, since it is larger than the sum of its proper divisors (8846329).

20294391 is a wasteful number, since it uses less digits than its factorization.

20294391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520385.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 20294391 is about 4504.9296331907. The cubic root of 20294391 is about 272.7671134423.

The spelling of 20294391 in words is "twenty million, two hundred ninety-four thousand, three hundred ninety-one".