201023207040 has 128 divisors (see below), whose sum is σ = 642850528320. Its totient is φ = 53431418880.

The previous prime is 201023207039. The next prime is 201023207081. The reversal of 201023207040 is 40702320102.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 201023206998 and 201023207016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418920 + ... + 759960.

Almost surely, 2^201023207040 is an apocalyptic number.

201023207040 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 201023207040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321425264160).

201023207040 is an abundant number, since it is smaller than the sum of its proper divisors (441827321280).

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

201023207040 is a wasteful number, since it uses less digits than its factorization.

201023207040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341370 (or 341358 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

Adding to 201023207040 its reverse (40702320102), we get a palindrome (241725527142).

The spelling of 201023207040 in words is "two hundred one billion, twenty-three million, two hundred seven thousand, forty".