19155002240 has 64 divisors (see below), whose sum is σ = 49955393520. Its totient is φ = 6965452800.

The previous prime is 19155002227. The next prime is 19155002287. The reversal of 19155002240 is 4220055191.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×19155002240² (a number of 21 digits) contains 22 as substring.

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, 1353401 + ... + 1367480.

Almost surely, 2^19155002240 is an apocalyptic number.

19155002240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19155002240 is an abundant number, since it is smaller than the sum of its proper divisors (30800391280).

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

19155002240 is a wasteful number, since it uses less digits than its factorization.

19155002240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720911 (or 2720899 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 19155002240 in words is "nineteen billion, one hundred fifty-five million, two thousand, two hundred forty".