21502523252014 has 32 divisors (see below), whose sum is σ = 41083989592320. Its totient is φ = 8216797915008.

The previous prime is 21502523252009. The next prime is 21502523252017. The reversal of 21502523252014 is 41025232520512.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21502523252017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2377541172 + ... + 2377550215.

It is an arithmetic number, because the mean of its divisors is an integer number (1283874674760).

Almost surely, 2^{21502523252014} is an apocalyptic number.

21502523252014 is a deficient number, since it is larger than the sum of its proper divisors (19581466340306).

21502523252014 is a wasteful number, since it uses less digits than its factorization.

21502523252014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4755091432.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 21502523252014 its reverse (41025232520512), we get a palindrome (62527755772526).

The spelling of 21502523252014 in words is "twenty-one trillion, five hundred two billion, five hundred twenty-three million, two hundred fifty-two thousand, fourteen".