20331221452 has 6 divisors (see below), whose sum is σ = 35579637548. Its totient is φ = 10165610724.

The previous prime is 20331221423. The next prime is 20331221479. The reversal of 20331221452 is 25412213302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2541402678 + ... + 2541402685.

Almost surely, 2^20331221452 is an apocalyptic number.

It is an amenable number.

20331221452 is a deficient number, since it is larger than the sum of its proper divisors (15248416096).

20331221452 is a wasteful number, since it uses less digits than its factorization.

20331221452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082805367 (or 5082805365 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 20331221452 its reverse (25412213302), we get a palindrome (45743434754).

The spelling of 20331221452 in words is "twenty billion, three hundred thirty-one million, two hundred twenty-one thousand, four hundred fifty-two".