201500312420 has 24 divisors (see below), whose sum is σ = 461618898048. Its totient is φ = 73272840800.

The previous prime is 201500312353. The next prime is 201500312459. The reversal of 201500312420 is 24213005102.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 201500312392 and 201500312401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457955036 + ... + 457955475.

It is an arithmetic number, because the mean of its divisors is an integer number (19234120752).

Almost surely, 2^201500312420 is an apocalyptic number.

201500312420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201500312420 is an abundant number, since it is smaller than the sum of its proper divisors (260118585628).

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

201500312420 is a wasteful number, since it uses less digits than its factorization.

201500312420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915910531 (or 915910529 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 201500312420 its reverse (24213005102), we get a palindrome (225713317522).

The spelling of 201500312420 in words is "two hundred one billion, five hundred million, three hundred twelve thousand, four hundred twenty".