23135132420 has 48 divisors (see below), whose sum is σ = 49643919360. Its totient is φ = 9052331904.

The previous prime is 23135132407. The next prime is 23135132477. The reversal of 23135132420 is 2423153132.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 23135132420.

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, 2127437 + ... + 2138283.

It is an arithmetic number, because the mean of its divisors is an integer number (1034248320).

Almost surely, 2^23135132420 is an apocalyptic number.

23135132420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23135132420 is an abundant number, since it is smaller than the sum of its proper divisors (26508786940).

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

23135132420 is a wasteful number, since it uses less digits than its factorization.

23135132420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13172 (or 13170 counting only the distinct ones).

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

Adding to 23135132420 its reverse (2423153132), we get a palindrome (25558285552).

The spelling of 23135132420 in words is "twenty-three billion, one hundred thirty-five million, one hundred thirty-two thousand, four hundred twenty".