19255019380 has 24 divisors (see below), whose sum is σ = 40440751848. Its totient is φ = 7701015168.

The previous prime is 19255019359. The next prime is 19255019393. The reversal of 19255019380 is 8391055291.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6979265764 + 12275753616 = 83542^2 + 110796^2 .

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, 108462 + ... + 224218.

It is an arithmetic number, because the mean of its divisors is an integer number (1685031327).

Almost surely, 2^19255019380 is an apocalyptic number.

19255019380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19255019380 is an abundant number, since it is smaller than the sum of its proper divisors (21185732468).

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

19255019380 is a wasteful number, since it uses less digits than its factorization.

19255019380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124083 (or 124081 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 43.

It can be divided in two parts, 1925501 and 9380, that added together give a square (1934881 = 1391²).

The spelling of 19255019380 in words is "nineteen billion, two hundred fifty-five million, nineteen thousand, three hundred eighty".