19976140 has 24 divisors (see below), whose sum is σ = 42325920. Its totient is φ = 7918848.

The previous prime is 19976113. The next prime is 19976141. The reversal of 19976140 is 4167991.

It is a self number, because there is not a number n which added to its sum of digits gives 19976140.

It is not an unprimeable number, because it can be changed into a prime (19976141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2160 + ... + 6679.

It is an arithmetic number, because the mean of its divisors is an integer number (1763580).

Almost surely, 2^19976140 is an apocalyptic number.

19976140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19976140 is an abundant number, since it is smaller than the sum of its proper divisors (22349780).

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

19976140 is a wasteful number, since it uses less digits than its factorization.

19976140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8961 (or 8959 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 19976140 is about 4469.4675298071. The cubic root of 19976140 is about 271.3337753650. Note that the first 3 decimals are identical.

The spelling of 19976140 in words is "nineteen million, nine hundred seventy-six thousand, one hundred forty".