20954197 has 8 divisors (see below), whose sum is σ = 23149440. Its totient is φ = 18807360.

The previous prime is 20954191. The next prime is 20954209. The reversal of 20954197 is 79145902.

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

It is not a de Polignac number, because 20954197 - 2⁷ = 20954069 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 (20954191) 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, 11188 + ... + 12925.

It is an arithmetic number, because the mean of its divisors is an integer number (2893680).

Almost surely, 2^20954197 is an apocalyptic number.

It is an amenable number.

20954197 is a deficient number, since it is larger than the sum of its proper divisors (2195243).

20954197 is a wasteful number, since it uses less digits than its factorization.

20954197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24203.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 20954197 is about 4577.5754499516. The cubic root of 20954197 is about 275.6916890852.

The spelling of 20954197 in words is "twenty million, nine hundred fifty-four thousand, one hundred ninety-seven".