21652421245602 has 64 divisors (see below), whose sum is σ = 51644099764224. Its totient is φ = 5917310688960.

The previous prime is 21652421245561. The next prime is 21652421245607. The reversal of 21652421245602 is 20654212425612.

It is a happy number.

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 (21652421245607) 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, 53450823 + ... + 53854389.

It is an arithmetic number, because the mean of its divisors is an integer number (806939058816).

Almost surely, 2^{21652421245602} is an apocalyptic number.

21652421245602 is an abundant number, since it is smaller than the sum of its proper divisors (29991678518622).

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

21652421245602 is a wasteful number, since it uses less digits than its factorization.

21652421245602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459143.

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 21652421245602 in words is "twenty-one trillion, six hundred fifty-two billion, four hundred twenty-one million, two hundred forty-five thousand, six hundred two".