19970901216 has 360 divisors, whose sum is σ = 70866457200. Its totient is φ = 5403884544.

The previous prime is 19970901211. The next prime is 19970901227. The reversal of 19970901216 is 61210907991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19970901211) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 6548460 + ... + 6551508.

It is an arithmetic number, because the mean of its divisors is an integer number (196851270).

Almost surely, 2^19970901216 is an apocalyptic number.

19970901216 is a gapful number since it is divisible by the number (16) 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 19970901216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35433228600).

19970901216 is an abundant number, since it is smaller than the sum of its proper divisors (50895555984).

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

19970901216 is a wasteful number, since it uses less digits than its factorization.

19970901216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3116 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 45.

The spelling of 19970901216 in words is "nineteen billion, nine hundred seventy million, nine hundred one thousand, two hundred sixteen".