19975240 has 32 divisors (see below), whose sum is σ = 45074880. Its totient is φ = 7966912.

The previous prime is 19975237. The next prime is 19975261. The reversal of 19975240 is 4257991.

It is a self number, because there is not a number n which added to its sum of digits gives 19975240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22077 + ... + 22963.

It is an arithmetic number, because the mean of its divisors is an integer number (1408590).

Almost surely, 2^19975240 is an apocalyptic number.

19975240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19975240 is an abundant number, since it is smaller than the sum of its proper divisors (25099640).

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

19975240 is a wasteful number, since it uses less digits than its factorization.

19975240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 19975240 is about 4469.3668455386. The cubic root of 19975240 is about 271.3297004359.

The spelling of 19975240 in words is "nineteen million, nine hundred seventy-five thousand, two hundred forty".