20021325543 has 6 divisors (see below), whose sum is σ = 28919692464. Its totient is φ = 13347550356.

The previous prime is 20021325539. The next prime is 20021325547. The reversal of 20021325543 is 34552312002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20021325539) and next prime (20021325547).

It is not a de Polignac number, because 20021325543 - 2² = 20021325539 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021325547) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112295855 + ... + 1112295872.

It is an arithmetic number, because the mean of its divisors is an integer number (4819948744).

Almost surely, 2^20021325543 is an apocalyptic number.

20021325543 is a deficient number, since it is larger than the sum of its proper divisors (8898366921).

20021325543 is a wasteful number, since it uses less digits than its factorization.

20021325543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224591733 (or 2224591730 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

Adding to 20021325543 its reverse (34552312002), we get a palindrome (54573637545).

The spelling of 20021325543 in words is "twenty billion, twenty-one million, three hundred twenty-five thousand, five hundred forty-three".