19945960 has 32 divisors (see below), whose sum is σ = 46094760. Its totient is φ = 7762176.

The previous prime is 19945949. The next prime is 19945973. The reversal of 19945960 is 6954991.

It can be written as a sum of positive squares in 4 ways, for example, as 19554084 + 391876 = 4422^2 + 626^2 .

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5259 + ... + 8218.

Almost surely, 2^19945960 is an apocalyptic number.

19945960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19945960 is an abundant number, since it is smaller than the sum of its proper divisors (26148800).

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

19945960 is a wasteful number, since it uses less digits than its factorization.

19945960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13525 (or 13521 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 19945960 is about 4466.0900125277. The cubic root of 19945960 is about 271.1970625880.

The spelling of 19945960 in words is "nineteen million, nine hundred forty-five thousand, nine hundred sixty".