21050124504 has 32 divisors (see below), whose sum is σ = 52732520640. Its totient is φ = 7002413600.

The previous prime is 21050124493. The next prime is 21050124539. The reversal of 21050124504 is 40542105012.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881382 + ... + 904949.

It is an arithmetic number, because the mean of its divisors is an integer number (1647891270).

Almost surely, 2^21050124504 is an apocalyptic number.

21050124504 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21050124504 is an abundant number, since it is smaller than the sum of its proper divisors (31682396136).

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

21050124504 is a wasteful number, since it uses less digits than its factorization.

21050124504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786831 (or 1786827 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

Adding to 21050124504 its reverse (40542105012), we get a palindrome (61592229516).

The spelling of 21050124504 in words is "twenty-one billion, fifty million, one hundred twenty-four thousand, five hundred four".