21241601502 has 64 divisors (see below), whose sum is σ = 47653816320. Its totient is φ = 6257347200.

The previous prime is 21241601501. The next prime is 21241601509. The reversal of 21241601502 is 20510614212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21241601501) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 353427 + ... + 409137.

It is an arithmetic number, because the mean of its divisors is an integer number (744590880).

Almost surely, 2^21241601502 is an apocalyptic number.

21241601502 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 21241601502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23826908160).

21241601502 is an abundant number, since it is smaller than the sum of its proper divisors (26412214818).

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

21241601502 is a wasteful number, since it uses less digits than its factorization.

21241601502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55889.

The product of its (nonzero) digits is 960, while the sum is 24.

The spelling of 21241601502 in words is "twenty-one billion, two hundred forty-one million, six hundred one thousand, five hundred two".