20920193 has 8 divisors (see below), whose sum is σ = 23983680. Its totient is φ = 17875440.

The previous prime is 20920189. The next prime is 20920201. The reversal of 20920193 is 39102902.

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 20920193 - 2² = 20920189 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20920103) 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, 2198 + ... + 6831.

It is an arithmetic number, because the mean of its divisors is an integer number (2997960).

Almost surely, 2^20920193 is an apocalyptic number.

It is an amenable number.

20920193 is a deficient number, since it is larger than the sum of its proper divisors (3063487).

20920193 is an equidigital number, since it uses as much as digits as its factorization.

20920193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9367.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 20920193 is about 4573.8597486149. The cubic root of 20920193 is about 275.5424795856.

It can be divided in two parts, 209 and 20193, that added together give a palindrome (20402).

The spelling of 20920193 in words is "twenty million, nine hundred twenty thousand, one hundred ninety-three".