452000021240 has 16 divisors (see below), whose sum is σ = 1017000047880. Its totient is φ = 180800008480.

The previous prime is 452000021233. The next prime is 452000021269. The reversal of 452000021240 is 42120000254.

It is a happy number.

It is a super-2 number, since 2×452000021240² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5650000226 + ... + 5650000305.

Almost surely, 2^452000021240 is an apocalyptic number.

452000021240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

452000021240 is an abundant number, since it is smaller than the sum of its proper divisors (565000026640).

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

452000021240 is a wasteful number, since it uses less digits than its factorization.

452000021240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11300000542 (or 11300000538 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

Adding to 452000021240 its reverse (42120000254), we get a palindrome (494120021494).

The spelling of 452000021240 in words is "four hundred fifty-two billion, twenty-one thousand, two hundred forty".