23451520400540 has 24 divisors (see below), whose sum is σ = 50946406388640. Its totient is φ = 9057138913088.

The previous prime is 23451520400533. The next prime is 23451520400579. The reversal of 23451520400540 is 4500402515432.

It is a self number, because there is not a number n which added to its sum of digits gives 23451520400540.

It is a congruent number.

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, 20216827352 + ... + 20216828511.

It is an arithmetic number, because the mean of its divisors is an integer number (2122766932860).

Almost surely, 2^{23451520400540} is an apocalyptic number.

23451520400540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23451520400540 is an abundant number, since it is smaller than the sum of its proper divisors (27494885988100).

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

23451520400540 is a wasteful number, since it uses less digits than its factorization.

23451520400540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40433655901 (or 40433655899 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 23451520400540 its reverse (4500402515432), we get a palindrome (27951922915972).

The spelling of 23451520400540 in words is "twenty-three trillion, four hundred fifty-one billion, five hundred twenty million, four hundred thousand, five hundred forty".