23012415453520 has 40 divisors (see below), whose sum is σ = 53504248015656. Its totient is φ = 9204900446208.

The previous prime is 23012415453497. The next prime is 23012415453529. The reversal of 23012415453520 is 2535451421032.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2098476726544 + 20913938726976 = 1448612^2 + 4573176^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×23012415453520² (a number of 28 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 23012415453520.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012415453529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11140704 + ... + 13043776.

Almost surely, 2^{23012415453520} is an apocalyptic number.

23012415453520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23012415453520 is an abundant number, since it is smaller than the sum of its proper divisors (30491832562136).

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

23012415453520 is a wasteful number, since it uses less digits than its factorization.

23012415453520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2054239 (or 2054233 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 23012415453520 its reverse (2535451421032), we get a palindrome (25547866874552).

The spelling of 23012415453520 in words is "twenty-three trillion, twelve billion, four hundred fifteen million, four hundred fifty-three thousand, five hundred twenty".