21502443245514 has 64 divisors (see below), whose sum is σ = 53694984084480. Its totient is φ = 5576872878720.

The previous prime is 21502443245483. The next prime is 21502443245519. The reversal of 21502443245514 is 41554234420512.

It is a super-2 number, since 2×21502443245514² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (21502443245519) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33756259 + ... + 34387350.

It is an arithmetic number, because the mean of its divisors is an integer number (838984126320).

Almost surely, 2^{21502443245514} is an apocalyptic number.

21502443245514 is an abundant number, since it is smaller than the sum of its proper divisors (32192540838966).

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

21502443245514 is a wasteful number, since it uses less digits than its factorization.

21502443245514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68144315.

The product of its (nonzero) digits is 768000, while the sum is 42.

The spelling of 21502443245514 in words is "twenty-one trillion, five hundred two billion, four hundred forty-three million, two hundred forty-five thousand, five hundred fourteen".