20888197 has 8 divisors (see below), whose sum is σ = 22907520. Its totient is φ = 18888960.

The previous prime is 20888177. The next prime is 20888213. The reversal of 20888197 is 79188802.

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 20888197 - 2²³ = 12499589 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 (20888177) 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, 2797 + ... + 7042.

It is an arithmetic number, because the mean of its divisors is an integer number (2863440).

Almost surely, 2^20888197 is an apocalyptic number.

It is an amenable number.

20888197 is a deficient number, since it is larger than the sum of its proper divisors (2019323).

20888197 is a wasteful number, since it uses less digits than its factorization.

20888197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10043.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 20888197 is about 4570.3607078654. The cubic root of 20888197 is about 275.4019334695.

The spelling of 20888197 in words is "twenty million, eight hundred eighty-eight thousand, one hundred ninety-seven".