19620250040 has 32 divisors (see below), whose sum is σ = 44164694880. Its totient is φ = 7844698752.

The previous prime is 19620250033. The next prime is 19620250057. The reversal of 19620250040 is 4005202691.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19620249985 and 19620250012.

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, 11804 + ... + 198443.

It is an arithmetic number, because the mean of its divisors is an integer number (1380146715).

Almost surely, 2^19620250040 is an apocalyptic number.

19620250040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19620250040 is an abundant number, since it is smaller than the sum of its proper divisors (24544444840).

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

19620250040 is a wasteful number, since it uses less digits than its factorization.

19620250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212591 (or 212587 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 19620250040 in words is "nineteen billion, six hundred twenty million, two hundred fifty thousand, forty".