21025350024 has 96 divisors (see below), whose sum is σ = 61487359200. Its totient is φ = 5973623040.

The previous prime is 21025349993. The next prime is 21025350043. The reversal of 21025350024 is 42005352012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21025349976 and 21025350003.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160564 + ... + 260444.

It is an arithmetic number, because the mean of its divisors is an integer number (640493325).

Almost surely, 2^21025350024 is an apocalyptic number.

21025350024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21025350024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30743679600).

21025350024 is an abundant number, since it is smaller than the sum of its proper divisors (40462009176).

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

21025350024 is a wasteful number, since it uses less digits than its factorization.

21025350024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100083 (or 100072 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The spelling of 21025350024 in words is "twenty-one billion, twenty-five million, three hundred fifty thousand, twenty-four".