19725530190 has 16 divisors (see below), whose sum is σ = 47341272528. Its totient is φ = 5260141376.

The previous prime is 19725530147. The next prime is 19725530191. The reversal of 19725530190 is 9103552791.

It is a super-2 number, since 2×19725530190² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19725530191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328758807 + ... + 328758866.

It is an arithmetic number, because the mean of its divisors is an integer number (2958829533).

Almost surely, 2^19725530190 is an apocalyptic number.

19725530190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19725530190 is an abundant number, since it is smaller than the sum of its proper divisors (27615742338).

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

19725530190 is a wasteful number, since it uses less digits than its factorization.

19725530190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657517683.

The product of its (nonzero) digits is 85050, while the sum is 42.

The spelling of 19725530190 in words is "nineteen billion, seven hundred twenty-five million, five hundred thirty thousand, one hundred ninety".