19490433580 has 24 divisors (see below), whose sum is σ = 40984010928. Its totient is φ = 7785868608.

The previous prime is 19490433541. The next prime is 19490433601. The reversal of 19490433580 is 8533409491.

It is a happy number.

It is a super-2 number, since 2×19490433580² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19490433580.

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, 628534 + ... + 658813.

It is an arithmetic number, because the mean of its divisors is an integer number (1707667122).

Almost surely, 2^19490433580 is an apocalyptic number.

19490433580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19490433580 is an abundant number, since it is smaller than the sum of its proper divisors (21493577348).

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

19490433580 is a wasteful number, since it uses less digits than its factorization.

19490433580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288113 (or 1288111 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

It can be divided in two parts, 194904 and 33580, that added together give a square (228484 = 478²).

The spelling of 19490433580 in words is "nineteen billion, four hundred ninety million, four hundred thirty-three thousand, five hundred eighty".