20703897 has 8 divisors (see below), whose sum is σ = 30672480. Its totient is φ = 13802580.

The previous prime is 20703847. The next prime is 20703913. The reversal of 20703897 is 79830702.

It is not a de Polignac number, because 20703897 - 2⁶ = 20703833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20703847) 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, 383379 + ... + 383432.

It is an arithmetic number, because the mean of its divisors is an integer number (3834060).

Almost surely, 2^20703897 is an apocalyptic number.

20703897 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20703897 is a deficient number, since it is larger than the sum of its proper divisors (9968583).

20703897 is an equidigital number, since it uses as much as digits as its factorization.

20703897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766820 (or 766814 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 20703897 is about 4550.1535138938. The cubic root of 20703897 is about 274.5895673556.

The spelling of 20703897 in words is "twenty million, seven hundred three thousand, eight hundred ninety-seven".