21442023402452 has 24 divisors (see below), whose sum is σ = 38081793576960. Its totient is φ = 10561747079520.

The previous prime is 21442023402451. The next prime is 21442023402493. The reversal of 21442023402452 is 25420432024412.

It is a super-2 number, since 2×21442023402452² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442023402451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29152043 + ... + 29878514.

It is an arithmetic number, because the mean of its divisors is an integer number (1586741399040).

Almost surely, 2^{21442023402452} is an apocalyptic number.

It is an amenable number.

21442023402452 is a deficient number, since it is larger than the sum of its proper divisors (16639770174508).

21442023402452 is a wasteful number, since it uses less digits than its factorization.

21442023402452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59031911 (or 59031909 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 35.

Adding to 21442023402452 its reverse (25420432024412), we get a palindrome (46862455426864).

The spelling of 21442023402452 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, four hundred fifty-two".