21124625510 has 48 divisors (see below), whose sum is σ = 40547666016. Its totient is φ = 7922276352.

The previous prime is 21124625491. The next prime is 21124625513. The reversal of 21124625510 is 1552642112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124625513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 746174 + ... + 773966.

It is an arithmetic number, because the mean of its divisors is an integer number (844743042).

Almost surely, 2^21124625510 is an apocalyptic number.

21124625510 is a deficient number, since it is larger than the sum of its proper divisors (19423040506).

21124625510 is a wasteful number, since it uses less digits than its factorization.

21124625510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28097 (or 28080 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The spelling of 21124625510 in words is "twenty-one billion, one hundred twenty-four million, six hundred twenty-five thousand, five hundred ten".