19624459920 has 160 divisors (see below), whose sum is σ = 65934446592. Its totient is φ = 4799748096.

The previous prime is 19624459919. The next prime is 19624459951. The reversal of 19624459920 is 2995442691.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469809 + ... + 509871.

Almost surely, 2^19624459920 is an apocalyptic number.

19624459920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19624459920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32967223296).

19624459920 is an abundant number, since it is smaller than the sum of its proper divisors (46309986672).

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

19624459920 is a wasteful number, since it uses less digits than its factorization.

19624459920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40249 (or 40243 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 51.

The spelling of 19624459920 in words is "nineteen billion, six hundred twenty-four million, four hundred fifty-nine thousand, nine hundred twenty".