20377197 has 8 divisors (see below), whose sum is σ = 30188480. Its totient is φ = 13584780.

The previous prime is 20377193. The next prime is 20377207. The reversal of 20377197 is 79177302.

It is not a de Polignac number, because 20377197 - 2² = 20377193 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 (20377193) 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, 377329 + ... + 377382.

It is an arithmetic number, because the mean of its divisors is an integer number (3773560).

Almost surely, 2^20377197 is an apocalyptic number.

20377197 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20377197 is a deficient number, since it is larger than the sum of its proper divisors (9811283).

20377197 is an equidigital number, since it uses as much as digits as its factorization.

20377197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754720 (or 754714 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 20377197 is about 4514.1108759090. The cubic root of 20377197 is about 273.1375951721.

The spelling of 20377197 in words is "twenty million, three hundred seventy-seven thousand, one hundred ninety-seven".