19900151568 has 240 divisors, whose sum is σ = 62173859904. Its totient is φ = 5891235840.

The previous prime is 19900151527. The next prime is 19900151599. The reversal of 19900151568 is 86515100991.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13065655 + ... + 13067177.

Almost surely, 2^19900151568 is an apocalyptic number.

19900151568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19900151568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31086929952).

19900151568 is an abundant number, since it is smaller than the sum of its proper divisors (42273708336).

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

19900151568 is a wasteful number, since it uses less digits than its factorization.

19900151568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734 (or 1725 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 45.

The spelling of 19900151568 in words is "nineteen billion, nine hundred million, one hundred fifty-one thousand, five hundred sixty-eight".