23521421330 has 64 divisors (see below), whose sum is σ = 48144385152. Its totient is φ = 8197770240.

The previous prime is 23521421327. The next prime is 23521421333. The reversal of 23521421330 is 3312412532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23521421327) and next prime (23521421333).

It is a super-2 number, since 2×23521421330² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23521421330.

It is not an unprimeable number, because it can be changed into a prime (23521421333) 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, 229562 + ... + 315818.

It is an arithmetic number, because the mean of its divisors is an integer number (752256018).

Almost surely, 2^23521421330 is an apocalyptic number.

23521421330 is an abundant number, since it is smaller than the sum of its proper divisors (24622963822).

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

23521421330 is a wasteful number, since it uses less digits than its factorization.

23521421330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86379.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 23521421330 its reverse (3312412532), we get a palindrome (26833833862).

The spelling of 23521421330 in words is "twenty-three billion, five hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty".