20155001899200 has 2016 divisors, whose sum is σ = 82539056590848. Its totient is φ = 4207550054400.

The previous prime is 20155001899199. The next prime is 20155001899211. The reversal of 20155001899200 is 299810055102.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 123650318319 + ... + 123650318481.

Almost surely, 2^{20155001899200} is an apocalyptic number.

20155001899200 is a gapful number since it is divisible by the number (20) 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 20155001899200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41269528295424).

20155001899200 is an abundant number, since it is smaller than the sum of its proper divisors (62384054691648).

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

20155001899200 is a wasteful number, since it uses less digits than its factorization.

20155001899200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The spelling of 20155001899200 in words is "twenty trillion, one hundred fifty-five billion, one million, eight hundred ninety-nine thousand, two hundred".