19624550420 has 12 divisors (see below), whose sum is σ = 41211555924. Its totient is φ = 7849820160.

The previous prime is 19624550381. The next prime is 19624550431. The reversal of 19624550420 is 2405542691.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2335982224 + 17288568196 = 48332^2 + 131486^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490613741 + ... + 490613780.

It is an arithmetic number, because the mean of its divisors is an integer number (3434296327).

Almost surely, 2^19624550420 is an apocalyptic number.

19624550420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19624550420 is an abundant number, since it is smaller than the sum of its proper divisors (21587005504).

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

19624550420 is a wasteful number, since it uses less digits than its factorization.

19624550420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981227530 (or 981227528 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 19624550420 in words is "nineteen billion, six hundred twenty-four million, five hundred fifty thousand, four hundred twenty".