201971473920 has 160 divisors (see below), whose sum is σ = 717419751840. Its totient is φ = 53859041280.

The previous prime is 201971473889. The next prime is 201971473927. The reversal of 201971473920 is 29374179102.

201971473920 is a `hidden beast` number, since 2 + 0 + 1 + 97 + 1 + 473 + 92 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201971473927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1391901 + ... + 1530140.

It is an arithmetic number, because the mean of its divisors is an integer number (4483873449).

Almost surely, 2^201971473920 is an apocalyptic number.

201971473920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201971473920 is an abundant number, since it is smaller than the sum of its proper divisors (515448277920).

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

201971473920 is an equidigital number, since it uses as much as digits as its factorization.

201971473920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922073 (or 2922051 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 201971473920 in words is "two hundred one billion, nine hundred seventy-one million, four hundred seventy-three thousand, nine hundred twenty".