21513413455510 has 16 divisors (see below), whose sum is σ = 39973310163072. Its totient is φ = 8327772950400.

The previous prime is 21513413455489. The next prime is 21513413455517. The reversal of 21513413455510 is 1555431431512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21513413455517) 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, 34699053651 + ... + 34699054270.

It is an arithmetic number, because the mean of its divisors is an integer number (2498331885192).

Almost surely, 2^{21513413455510} is an apocalyptic number.

21513413455510 is a deficient number, since it is larger than the sum of its proper divisors (18459896707562).

21513413455510 is a wasteful number, since it uses less digits than its factorization.

21513413455510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69398107959.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 21513413455510 in words is "twenty-one trillion, five hundred thirteen billion, four hundred thirteen million, four hundred fifty-five thousand, five hundred ten".