19978250030 has 16 divisors (see below), whose sum is σ = 35976739680. Its totient is φ = 7987768992.

The previous prime is 19978250029. The next prime is 19978250063. The reversal of 19978250030 is 3005287991.

It is a super-2 number, since 2×19978250030² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 417554 + ... + 462933.

It is an arithmetic number, because the mean of its divisors is an integer number (2248546230).

Almost surely, 2^19978250030 is an apocalyptic number.

19978250030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19978250030 is a deficient number, since it is larger than the sum of its proper divisors (15998489650).

19978250030 is a wasteful number, since it uses less digits than its factorization.

19978250030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882763.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 19978250030 in words is "nineteen billion, nine hundred seventy-eight million, two hundred fifty thousand, thirty".