20197960 has 32 divisors (see below), whose sum is σ = 46506240. Its totient is φ = 7890624.

The previous prime is 20197939. The next prime is 20197963. The reversal of 20197960 is 6979102.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20197963) 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, 4152 + ... + 7591.

It is an arithmetic number, because the mean of its divisors is an integer number (1453320).

Almost surely, 2^20197960 is an apocalyptic number.

20197960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20197960 is an abundant number, since it is smaller than the sum of its proper divisors (26308280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20197960 is a wasteful number, since it uses less digits than its factorization.

20197960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11797 (or 11793 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 20197960 is about 4494.2140580974. The cubic root of 20197960 is about 272.3343998469.

The spelling of 20197960 in words is "twenty million, one hundred ninety-seven thousand, nine hundred sixty".