23421015201540 has 96 divisors (see below), whose sum is σ = 71541343117440. Its totient is φ = 5677759360000.

The previous prime is 23421015201539. The next prime is 23421015201541. The reversal of 23421015201540 is 4510251012432.

It is an interprime number because it is at equal distance from previous prime (23421015201539) and next prime (23421015201541).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 23421015201498 and 23421015201507.

It is not an unprimeable number, because it can be changed into a prime (23421015201541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94698040 + ... + 94945040.

It is an arithmetic number, because the mean of its divisors is an integer number (745222324140).

Almost surely, 2^{23421015201540} is an apocalyptic number.

23421015201540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23421015201540 is an abundant number, since it is smaller than the sum of its proper divisors (48120327915900).

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

23421015201540 is a wasteful number, since it uses less digits than its factorization.

23421015201540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390693 (or 390691 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 23421015201540 its reverse (4510251012432), we get a palindrome (27931266213972).

The spelling of 23421015201540 in words is "twenty-three trillion, four hundred twenty-one billion, fifteen million, two hundred one thousand, five hundred forty".