20930197 has 8 divisors (see below), whose sum is σ = 21819296. Its totient is φ = 20058192.

The previous prime is 20930183. The next prime is 20930201. The reversal of 20930197 is 79103902.

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

It is a de Polignac number, because none of the positive numbers 2^k-20930197 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 (20930167) 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, 1743 + ... + 6700.

It is an arithmetic number, because the mean of its divisors is an integer number (2727412).

Almost surely, 2^20930197 is an apocalyptic number.

It is an amenable number.

20930197 is a deficient number, since it is larger than the sum of its proper divisors (889099).

20930197 is an equidigital number, since it uses as much as digits as its factorization.

20930197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8547.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 20930197 is about 4574.9532238046. The cubic root of 20930197 is about 275.5863938983.

The spelling of 20930197 in words is "twenty million, nine hundred thirty thousand, one hundred ninety-seven".