19201242240 has 128 divisors (see below), whose sum is σ = 68004460800. Its totient is φ = 5120326656.

The previous prime is 19201242239. The next prime is 19201242251. The reversal of 19201242240 is 4224210291.

19201242240 is a `hidden beast` number, since 192 + 0 + 12 + 422 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538312 + ... + 572871.

It is an arithmetic number, because the mean of its divisors is an integer number (531284850).

Almost surely, 2^19201242240 is an apocalyptic number.

19201242240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19201242240 is an abundant number, since it is smaller than the sum of its proper divisors (48803218560).

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

19201242240 is a wasteful number, since it uses less digits than its factorization.

19201242240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111211 (or 1111193 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The spelling of 19201242240 in words is "nineteen billion, two hundred one million, two hundred forty-two thousand, two hundred forty".