19950275520 has 252 divisors, whose sum is σ = 79824568824. Its totient is φ = 4560030720.

The previous prime is 19950275453. The next prime is 19950275531. The reversal of 19950275520 is 2557205991.

19950275520 is a `hidden beast` number, since 1 + 9 + 9 + 50 + 2 + 75 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (252).

It is a super-2 number, since 2×19950275520² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70435 + ... + 211805.

It is an arithmetic number, because the mean of its divisors is an integer number (316764162).

Almost surely, 2^19950275520 is an apocalyptic number.

19950275520 is a gapful number since it is divisible by the number (10) 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 19950275520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39912284412).

19950275520 is an abundant number, since it is smaller than the sum of its proper divisors (59874293304).

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

19950275520 is a wasteful number, since it uses less digits than its factorization.

19950275520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141408 (or 141388 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 45.

The spelling of 19950275520 in words is "nineteen billion, nine hundred fifty million, two hundred seventy-five thousand, five hundred twenty".